Columbia subject headings:
Columbus, Christopher--Religion.
Explorers--America--Biography.
Explorers--Spain--Biography.
Jews--Spain--History.
Harvard subject headings:
Columbus, Christopher--Religion.
Explorers--America--Biography
Explorers--Spain--Biography
Jews--Spain--History.
Princeton subject headings:
Columbus, Christopher--Religion.
Explorers--America--Biography.
Explorers--Spain--Biography.
Jews--Spain--History.