Columbia subject headings:
Literature and morals.
Nabokov, Vladimir Vladimirovich, 1899-1977--Criticism and interpretation.
Harvard subject headings:
Literature and morals.
Nabokov, Vladimir Vladimirovich, 1899-1977--Criticism and interpretation.
Princeton subject headings:
Literature and morals.
Nabokov, Vladimir Vladimirovich, 1899-1977--Criticism and interpretation.