Columbia subject headings:
Harvard subject headings:
Discourse analysis--Handbooks, manuals, etc.
Languages in contact--Handbooks, manuals, etc.
Sociolinguistics--Handbooks, manuals, etc.
Princeton subject headings:
Grammar, Comparative and general--Handbooks, manuals, etc.
Handbooks and manuals.
Languages in contact--Handbooks, manuals, etc.
Multilingualism--Handbooks, manuals, etc.
Sociolinguistics--Handbooks, manuals, etc.