Columbia subject headings:
Colorado--History--To 1876.
Land settlement--Colorado--History.
Land settlement--New Mexico--History.
Maxwell Land Grant--Biography.
McMains, O. P.
New Mexico--History.
Harvard subject headings:
Colorado--History--To 1876.
Land settlement--Colorado--History.
Land settlement--New Mexico--History.
Maxwell Land Grant (N.M. and Colo.)--Biography.
Maxwell Land Grant--Biography.
McMains, O. P.
New Mexico--History
Princeton subject headings:
Colorado--History--To 1876.
Land settlement--Colorado--History.
Land settlement--New Mexico--History.
Maxwell Land Grant--Biography.
McMains, O. P.
New Mexico--History.