Columbia subject headings:
English language--Syntax.
Yeats, W. B. (William Butler), 1865-1939--Language.
Harvard subject headings:
English language--Syntax
Yeats, W. B. (William Butler), 1865-1939--Language.
Princeton subject headings:
English language--Syntax.
Yeats, W. B. (William Butler), 1865-1939--Language--Grammar.