Columbia subject headings:
English language--Idioms.
English language--Orthography and spelling.
Law.
Logic.
Natural history.
Harvard subject headings:
English language--Idioms
English language--Orthography and spelling
Law
Logic
Natural history
Readers.
Princeton subject headings:
English language--Errors of usage.
English language--Idioms.
English language--Orthography and spelling.
Law.
Logic.
Natural history.