found: LCCN 61-17383: Her Animal tissue techniques, 1962(hdg.: Humason, Gretchen L.)
found: LC data base, 5-9-85(hdg.: Humason, Gretchen L.; usage: Gretchen L. Humason)
found: BL SRIS, 31st July 2001(hdg.: Humason, Gretchen Lyon)
found: A pliocene pinniped from the San Diego formation of Southern California, 1948(Gretchen Lyon Burleson)
found: OCLC, Sept. 28, 2009(hdg.: Lyon, Gretchen M.; Lyon, Gretchen Mary, 1907-; Burleson, Gretchen Mary; Burleson, Gretchen Mary (Lyon), 1907- ; Humason, Gretchen L.; usage: Gretchen M. Lyon; Gretchen L. Humason)
found: American men & women of science, 1971-1972(Gretchen Lyon Humason; b. May 12, 1907, Iowa City, Iowa; AB 1929, MA 1935 in Zoology from University of California, Los Angeles)