Columbia subject headings:
Explorers--New Spain.
Missionaries--New Spain.
New Spain--History.
North America--Discovery and exploration--Spanish.
Harvard subject headings:
Explorers--New Spain.
Missionaries--New Spain.
New Spain--History.
North America--Discovery and exploration--Spanish.
Princeton subject headings:
Explorers--Mexico--History--16th century.
Explorers--Spain--History--16th century.
Mexico--Discovery and exploration--Spanish.
Mexico--History--Conquest, 1519-1540.
Mexico--History--Spanish colony, 1540-1810.