Columbia subject headings:
Harvard subject headings:
Christie, Agatha, 1890-1976--Marriage.
Detective and mystery stories--Authorship
Missing persons--England--History--20th century.
Women authors, English--20th century--Biography.
Princeton subject headings:
Christie, Agatha, 1890-1976.
Detective and mystery stories--Authorship.
Women authors, English--20th century--Biography.