Columbia subject headings:
Coffin, Robert Tristam, 1892-1955.
Harvard subject headings:
Authors, American--20th century--Biography
Coffin, Robert P. Tristram (Robert Peter Tristram), 1892-1955
Farm life--Maine.
Maine--Social life and customs.
Princeton subject headings:
Coffin, Robert P. Tristram (Robert Peter Tristram), 1892-1955.