'At top of map: ' United States Department of the Interior. Geological Survey.' ' Bulletin 1021, Plate 32.' At bottom of map: 'Geology by Donald E. Hibbard and Mike S. Johnson, 1952.' 'Base from USAF Aeronautical Chart and Information Service, April 1952.' 'Interior--Geological Survey, Washington, D.C. MR-3767.' Scale 1:63,360 (W 116°10--W 115°55/N 37°15--N 36°40)
Geological Survey bulletin, 1021