Columbia subject headings:
Harvard subject headings:
Applied linguistics--Political aspects.
Language and languages--Standardization.
Language maintenance
Language planning--Research--Methodology.
Language policy--Research--Methodology.
Sociolinguistics
Princeton subject headings:
Applied linguistics--Political aspects.
Language and languages--Standardization.
Language maintenance.
Language planning--Research--Methodology.
Language policy--Research--Methodology.
Sociolinguistics.