21. The poem exists in several incunabula . 22. He showed great interest in incunabula and increased their collection in that area during his tenure. 23. The data in this section were derived from the Incunabula Short-Title Catalogue ( ISTC ). 24. The largest and most important form of " incunabula " of the era was satire. 25. An incunable ( plural incunabula ) is a book, pamphlet or printed in Europe before 1501. 26. Chwolson was an indefatigable collector of Hebrew books, and his collection of Hebrew incunabula was valuable. 27. Besides the medieval manuscripts, there are also fine incunabula , printed as early as before 1501. 28. Assets now include nearly 20, 000 printed volumes, including precious incunabula and over 400 manuscripts. 29. Catalogue of Hebrew Incunabula from the Collection of the Library of the Jewish Theological Seminary of America. 30. This canon is also known as the " secret canon " used in many medieval manuscripts and incunabula .
