Грихальва
The NWAF was organized in 1952 for the purpose of supporting archaeological research into pre-Columbian cultures of Mesoamerica. It was founded by Thomas Stuart Ferguson, Alfred V. Kidder and Harvard University professor Gordon Willey. It was initially incorporated in California as a private organization with Ferguson in charge of fund-raising. The first project by the NWAF was headed by Pedro Armillas with archaeological studies along the Grijalva River.