Columbia subject headings:
Central America--Description and travel.
Mexico--Description and travel.
Morris, Mary, 1947---Travel--Central America.
Morris, Mary, 1947---Travel--Mexico.
Harvard subject headings:
Central America--Description and travel.
Mexico--Description and travel.
Morris, Mary, 1947---Journeys--Central America.
Morris, Mary, 1947---Journeys--Mexico.
Princeton subject headings:
Central America--Description and travel.
Mexico--Description and travel.
Morris, Mary, 1947---Travel--Central America.
Morris, Mary, 1947---Travel--Mexico.