eReference
General Reference Works
American National Biography
Complete Dictionary of Scientific Biography
Dictionary of Irish Biography
International Who's Who
Oxford Dictionary of National Biography
Oxford English Dictionary
Who's Who
Who Was Who
Subject specific reference
Corpus des dictionnaires de l'Académie française [du 17e au 20e siècle]
Dictionary of Medical Biography
Dictionary of Old English Corpus in Electronic Form
Database of Latin Dictionaries
Encyclopaedia Judaica
Encyclopaedia of Islam
Encyclopaedia of the Qu'ran
Encyclopedia of Applied Psychology
Encyclopedia of Biological Chemistry
Encyclopedia of Cancer
Encyclopedia of Language and Linguistics
Encyclopedia of Life Sciences
Encyclopedia of popular music
Encyclopedia of the Neurological Sciences
Encyclopedie Diderot
International Dictionary of Psychoanalysis
International Encyclopedia of the Social and Behavioral Sciences
New Palgrave Dictionary of Economics Online
Oxford History of Western music
Oxford Language Dictionaries
Stanford Encyclopedia of Philosophy