Columbia subject headings:
Harvard subject headings:
Authors, English--20th century--Biography
Christie, Agatha, 1890-1976
Christie, Agatha, 1890-1976--Plots.
Detective and mystery stories, English--Stories, plots, etc.
Princeton subject headings:
Authors, English--20th century--Biography.
Christie, Agatha, 1890-1976--Plots.
Christie, Agatha, 1890-1976.