Excavation of Tres Zapotes Stela D, 1939 Image: stirling_24. Photograph by Richard H. Stewart, National Anthropological Archives

1939 – 1946
Smithsonian Institution -
National Geographic Society expeditions

Excavation of the Ceremonial Court at La Venta, 1955 Image: heizer_1169, National Anthropological Archives

1955
Smithsonian Institution -
National Geographic Society -
UCLA expedition and later fieldwork

Note: the 1955 expedition section of this website is still under construction.