The national union catalogue pre 1956 imprints. Chicago, American Library Association, 1968-1981.

British biographical archive: a one-alphabet cumulation of 310 of the most important English-language biographical reference works originally published between 1601 and 1929. Managing editor Laureen Baillie, editor Paul Seeveking. Munchen, K. G. Saur, 1984 (Microfiches)