Columbia subject headings:
Harvard subject headings:
Historians--United States--Biography
Sonnichsen, C. L. (Charles Leland), 1901-
Sonnichsen, C. L. (Charles Leland), 1901-1991
Southwest, New--Historiography.
West (U.S.)--Intellectual life.
Princeton subject headings:
Historians--United States--Biography.
Sonnichsen, C. L. (Charles Leland), 1901-1991.
Southwest, New--Historiography.