B.M. = Catalogue of Books printed in the XVth century now in the British
Museum. Parts 1-111. 1908-1913.
Campbell. = Annales de la typographie neerlandaise au XVe siecle. Par M.
F. A. G. Campbell. 1874.
Copinger. = Supplement to Hain's Repertorium Bibliographicum. By W. A.
Copinger. 1895-1902.
Hain. = Repertorium bibliographicum in quo libri omnes ab arte
typographica inventa usque ad annum MD typis expressi ordine alphabetico
vel simpliciter enumerantur vel adcuratius recensentur. Opera Ludovici
Hain. 1826-1838.
Proctor. = An Index to the Early Printed Books in the British Museum from
the invention of printing to the year MD. By Robert Proctor. 1898.