Columbia subject headings:
Novelists, American--20th century--Biography.
Sinclair, Upton, 1878-1968.
Harvard subject headings:
Novelists, American--20th century--Biography
Sinclair, Upton, 1878-1968
Princeton subject headings:
Novelists, American--20th century--Biography.
Sinclair, Upton, 1878-1968.