https://cerl.org/ 2026-05-14T13:17:55+00:00 https://cerl.org/ https://cerl.org/_media/wiki/dokuwiki.svg text/html 2026-03-26T08:59:36+00:00 Anonymous (anonymous@undisclosed.example.com) https://cerl.org/help/ipi/main?rev=1774515576&do=diff Paul Needham: Index Possessorum Incunabulorum Index Possessorum Incunabulorum is a list of owners of incunabula that Dr Paul Needham, Scheide Librarian, Scheide Library, Princeton University Library, has steadily grown throughout his career. We are very grateful to Dr Needham for letting CERL make available to the public his extraordinary tool for provenance research.