| 1541 | Carte | HEL2.1 | Heliodor | In Paulum Alexandrinum Commentarium | da |
| 1542 | Carte | OLY1.1 | Olympiodoros | In Platonis Gorgias Commentarium | da |
| 1543 | Carte | ALT1.1 | Iacobus de Altavillia | In primum librum Sententiarum. Ms. Erfurt, Ampoloniana CA 2° 118 | da |
| 1544 | Carte | WEI1.16 | Weijers, Olga | In search of the truth. A history of disputation techniques from antiquity to early modern times | da |
| 1545 | Carte | TRA1.1 | Tramontana, Alessandra | In Sicilia a scuola con Persio. Le lezioni dell'umanista Tommaso Schifaldo | da |
| 1546 | Carte | FIS1.1 | Fishacre, Richard | In Tertium Librum Sententiarum Teil 2: Dist. 23-40 | da |
| 1547 | Carte | ADA3.1#2 | Adamson, Peter | In the age of al-Fārābī: Arabic philosophy in the fourth/tenth century | da |
| 1548 | Carte | ADA3.1 | Adamson, Peter | In the age of al-Fārābī: Arabic philosophy in the fourth/tenth century | nu |
| 1549 | Carte | MAR1.1 | Marek, Christian | In the Land of a Thousand Gods: A History of Asia Minor in the Ancient World | da |
| 1550 | Carte | MUS1.4 | Musca, Vasile | Incercare asupra gandirii romanesti | da |
| 1551 | Carte | ~C.23 | Lancranjan, Ioan | Incercari de reabilitare a gandirii crestine medievale. Studiu de sinteza | da |
| 1552 | Articol | X-aba1.1 | Abaelard, Peter; ed. Geyer, Bernhard | Incipiunt Glossae secundum magistrum Petrum Abaelardum super Porphyrium | da |
| 1553 | Articol | X-wer1.1 | Werner, Hans-Joachim | Incommunicabilitas et Libertas | da |
| 1554 | Carte | ARI1.53.1 | Hermann Bonitz | Index Aristotelicus, vol I | da |
| 1555 | Carte | ARI1.53.2 | Hermann Bonitz | Index Aristotelicus, vol II | da |
| 1556 | Carte | GIL1.1 | Gilson, Etienne | Index scolastico-cartesien | da |
| 1557 | Carte | THO1.4 | | Indices auctoritatum omnique rerum notabilium occurrentium in S.T et in S.C.G | da |
| 1558 | Articol | X-tat1.2 | Tătaru-Cazaban, Bogdan | Individualitate și infinit la Nicolaus Cusanus | da |
| 1559 | Carte | BAR7.1 | Barber, Kenneth F.; Garcia, Jorge J. E. (eds.) | Individuation and Identity in Early Modern Philosophy, | da |
| 1560 | Carte | GRA2.3 | Gracia, Jorge J. E. (ed.) | Individuation in Later Scholasticism and Counter-Reformation. 1150-1650 | da |
| 1561 | Carte | GRA2.1 | Gracia, Jorge J. E. | Individuation in Scholasticism | da |
| 1562 | Carte | TAR2.1 | Tarlazzi, Caterina | Individui universali. Il realismo di Gualtiero di Mortagne nel XII secolo | da |
| 1563 | Carte | AER1.2.2 | Aertsen, Ian A. (ed.); et al. | Individuum und Individualitat im Mitteralter | da |
| 1564 | Carte | AER1.2.1 | Aertsen, Ian A. (ed.); et al. | Individuum und Individualitat im Mitteralter | da |
| 1565 | Articol | X-sor1.1 | Sorabji, Richard | Infinite power impressed: the transformation of Aristotle's physics and theology | da |
| 1566 | Articol | X-car3.1 | Carreras y Artau, Joaquín | Influencia de Ramon Llull en pensamiento teologico-filosofico de los siglos XIV y XV | da |
| 1567 | Carte | BLA4.2 | Blair, Ann; Duguid, Paul; Goeing, Anja-Silvia; Grafton, Anthony (eds.) | Information: a historical companion | nu |
| 1568 | Carte | LIT1.1 | Little, A. G. (ed.) | Initia Operum Latinorum quae saeculis XIII, XIV, XV attribuuntur | da |
| 1569 | Carte | VAT1.1.1 | Marcus Vattaso | Initia Patrum aliorumque scriptorum ecclesiasticorum latinorum ex Mignei Patrologia et ex compluribus aliis libris... (volumen I A-M) | da |
| 1570 | Carte | VAT1.1.2 | Marcus Vattaso | Initia Patrum aliorumque scriptorum ecclesiasticorum latinorum ex Mignei Patrologia et ex compluribus aliis libris... (volumen II N-Z) | da |
| 1571 | Carte | BAU4.1 | P. Chrysostomus Baur O.S.B. | Initia Patrum Graecorum (vol. 1 A-Λ ) | da |
| 1572 | Carte | BAU4.2 | P. Chrysostomus Baur O.S.B. | Initia Patrum Graecorum (vol. 1 M-Ω ) | da |
| 1573 | Carte | GAR1.1.1 | Gardeil, Henri-Dominique | Initiation à la philosophie de saint Thomas d'Aquin (I) | da |
| 1574 | Carte | GAR1.1.2 | Gardeil, Henri-Dominique | Initiation à la philosophie de saint Thomas d'Aquin (II) | da |
| 1575 | Carte | TOR1.1 | Torell, Jean-Pierre O.P. | Initiation a Saint Thomas d'Aquin, Sa personne et son oeuvre | da |
| 1576 | Articol | x-eva1.1 | Evans, G. | Inopes verborum sunt latini, Technical Language and Technical terms in the Writings of St.Anselm and some Commentators of the Mid-twelft Century | da |
| 1577 | Carte | SOL2.1 | Solmsen, F. (ed.) | Inscriptiones graecae ad inlustrandas dialectos selectae | da |
| 1578 | Carte | COD2.1 | Coda, Elisa (ed.) | Insegnare e disputare : la vita intellettuale e universitaria nel Medioevo | nu |
| 1579 | Articol | X-gre1.1 | Greene, Robert A. | Instinct of nature: natural law, synderesis, and the moral sense | da |
| 1580 | Carte | CAS2.1 | Cassiodor | Institutiile | da |
| 1581 | Carte | XEN1.4 | Xenophon | Institutio Cyri | da |
| 1582 | Carte | QUI1.2.1 | Quintilianus | Institutionis Oratoriae | da |
| 1583 | Carte | QUI1.1.1 | M. F. Quintilian | Institutionis oratoriae libri duodecim, vol. I (libri I-VI) | da |
| 1584 | Carte | QUI1.1.2 | M. F. Quintilian | Institutionis oratoriae libri duodecim, vol. II (libri VII-XII) | da |
| 1585 | Carte | BOY1.1 | Boyle, Leonard E. | Integral palaeography | da |
| 1586 | Articol | x-ris1.3 | Rist, John M. | Integration and the undescended soul in Plotinus | da |
| 1587 | Articol | X-jol1.2 | Jolivet, Jean | Intelecte et Inteligence: note sur la tradition Arabo-Latine des XII et XIII Siecles | da |
| 1588 | Carte | BRA1.3 | Brague, Remi | Înțelepciunea lumii. Istoria experienței umane a universului | da |
| 1589 | Carte | IHIW6 | | Intellectual History of the Islamicate World | da |
| 1590 | Carte | FRI1.1.1 | Friedman, Russell L. | Intellectual traditions at the medieval university Vol. 1 | da |
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