Columbia subject headings:
Harvard subject headings:
Explorers--Mexico, North--History.
Mexico, North--Discovery and exploration--Spanish.
Mexico, North--History--Sources.
New Spain--Discovery and exploration--Spanish.
West (U.S.)--History--Sources.
Princeton subject headings:
Explorers--Mexico--History--16th century.
Explorers--Spain--History--16th century.
Mexico--Discovery and exploration--Spanish.
Mexico--History--Spanish colony, 1540-1810.
Southwest, New--History--To 1848.