Rarebooks.info provides 101 electronic bibliographies online. Subjects cover early printing, world literature, natural history, science, medicine, theology, cultural and area studies, Judaica, music, theology, art and architecture, among others. Key bibliographies include standard reference works by Goff (Incunabula), Brunet (Manuel), Sabin (Americana), Fairfax Murray (French and German Books), and many more hard-to-find works.