Columbia subject headings:
Harvard subject headings:
Bernoulli, Carl Gustav, 1834-1878.
Explorers--Guatemala--Biography.
Explorers--Switzerland--Biography.
Guatemala--Discovery and exploration--Swiss.
Mayas--Guatemala--Antiquities.
Tikal Site (Guatemala)--Discovery and exploration.
Princeton subject headings:
Bernoulli, Carl Gustav, 1834-1878.
Explorers--Guatemala--Biography.
Explorers--Switzerland--Biography.
Guatemala--Discovery and exploration--Swiss.
Tikal Site (Guatemala)--Discovery and exploration.