Columbia subject headings:
Grammar, Comparative and general--Mass nouns.
Logic, Symbolic and mathematical.
Semantics.
Set theory.
Harvard subject headings:
Grammar, Comparative and general--Mass nouns.
Logic, Symbolic and mathematical.
Semantics.
Set theory.
Princeton subject headings:
Grammar, Comparative and general--Mass nouns.
Logic, Symbolic and mathematical.
Semantics.
Set theory.