[City and University libraries]
De blokboeken en incunabelen in Haarlems Libry, Dr. G.J. Jaspers. De zestiende eeuw in de Stadsbibliotheek Haarlem. Zimelien, Bücherschätze der Universitäts-Bibliothek Leipzig. Bibliotheca Palatina (2 vols) and 16 other works concerning libraries.
(total 20)