Columbia subject headings:
Harvard subject headings:
Blyton, Enid--Criticism and interpretation.
Fleming, Ian, 1908-1964--Criticism and interpretation.
Spy stories, English--History and criticism.
Princeton subject headings:
Best sellers--Great Britain--History--20th century.
Blyton, Enid--Criticism and interpretation.
Books and reading--Great Britain--History--20th century.
Children's literature, English--History and criticism--20th century.
English literature--20th century--History and criticism.
Fleming, Ian, 1908-1964--Criticism and interpretation.
Spy stories--History and criticism.