Subject: Database's vocabulary (different for each database)
Keyword: Your vocabulary
LImiters: Special to each database ("Age Group" below)
Databases use a grammar of AND, OR, AND NOT -- a language of mathematics. No prepositions, verbs, determiners, affixes -- anything you learned in English or human language classes.
These databases are the ones you should use to start your search for research articles.
These databases also include resources covering Sociology topics.