In 1937, Spencer and two friends spent a summer doing research in
Chaco Canyon in New Mexico. "I was overwhelmed by the Southwest," she recalled later. "Things just opened up for me." In 1940, she co-edited
A Bibliography of Navaho Indians with
Clyde Kluckhohn. During and after
World War II, Spencer did fieldwork in Alaska and worked in
Washington, D.C. After retiring from American University, Halpern was a researcher at the
Wheelwright Museum of the American Indian in
Santa Fe, New Mexico, resulting in
Reflection of Social Life in the Navaho Origin Myth (1983). She also contributed to the catalogue for the Wheelwright's show,
Woven Holy People: Navajo Sandpainting Textiles from the Permanent Collection (1982). She wrote two biographies of anthropologists,
Applied Anthropologist and Public Servant: The Life and Work of Philleo Nash (1983), and
Washington Matthews: Studies of Navajo Culture, 1880-1894 (1997, co-edited with Susan Brown McGreevy). == Personal life ==