Columbia subject headings:
Christie, Agatha, 1890-1976--Criticism and interpretation.
Harvard subject headings:
Christie, Agatha, 1890-1976--Criticism and interpretation.
Detective and mystery stories, English--History and criticism.
Princeton subject headings:
Christie, Agatha, 1890-1976--Criticism and interpretation.
Detective and mystery stories, English--History and criticism.
Women and literature--England--History--20th century.