From the Oxford English Dictionary.
American Sign Language n. (also with lower-case initials in the second and third elements) a form of sign language developed in the early 19th cent. for the use of the deaf in the United States; abbreviated ASL; cf. Ameslan n.
Albertsons Library provides access to over 290 research databases and indexes via its "Articles, Databases A-Z" link on the library's homepage: https://www.boisestate.edu/library/
We have created several subject-specific lists of databases germane to your topic. The following databases cover the spectrum of American Sign Language research and scholarship:
Pronunciator (also available to anyone in Idaho via lili.org)
Communication & Mass Media Complete
Linguistics and Language Behavior Abstracts
MLA International Bibliography