Encyclopedia of Deafness and Hearing Disorders by Contains articles on physical and medical aspects of deafness and shorter articles on related persons, topics, and organizations
Gallaudet Encyclopedia of Deaf People and Deafness by Somewhat dated, but still the definitive and comprehensive encyclopedia on all aspects of deafness, scientific, social, and historical
Deaf Persons in the Arts and Sciences by 
The Gallaudet Dictionary of American Sign Language by 
American Sign Language Dictionary by 
A Historical and Etymological Dictionary of American Sign Language by 