Columbia subject headings:
Harvard subject headings:
English language--19th century--Social aspects.
English language--19th century--Usage.
English language--19th century--Variation.
English language--English-speaking countries.
Historical linguistics.
Princeton subject headings:
English language--19th century--Social aspects.
English language--19th century--Usage.
English language--19th century--Variation.
English language--English-speaking countries.
Historical linguistics.