Columbia subject headings:
Lewis, Sinclair, 1885-1951--Homes and haunts--Minnesota.
Lewis, Sinclair, 1885-1951--Homes and haunts.
Harvard subject headings:
Lewis, Sinclair, 1885-1951--Homes and haunts--Minnesota.
Lewis, Sinclair, 1885-1951--Homes and haunts.
Princeton subject headings:
Lewis, Sinclair, 1885-1951--Biography.