Columbia subject headings:
Powell, Lawrence Clark, 1906-2001.
Sayers, Frances Clarke, 1897-1989.
Wheeler, Joseph L., 1884-1970.
Harvard subject headings:
Powell, Lawrence Clark, 1906-2001
Sayers, Frances Clarke, 1897-
Sayers, Frances Clarke, 1897-1989.
Wheeler, Joseph L., 1884-1970
Princeton subject headings: