Skip to content"Gilbert Geol. Note books, Around Flagstaff: SF Mts., Red Butte" - Record Group 57, Records of the United States Geological Survey: Geologists Field Notebook, No. 3447, G.K. Gilbert, 1891; Geologists Field Notebook No. 3448, G.K. Gilbert, 1891; Geologists Field Notebook No. 3449, G.K. Gilbert, 1891" | Collections | The Huntington