Benson, William Edward Barnes, 1919- Preliminary report on the White Canyon area, San Juan County, Utah, by W. E. Benson [and others] - Washington, 1952. - iii, 10 p. maps (1 fold.) table. 27 cm. - Geological Survey circular 217 . - United States Geological Survey. Circular 217 . "Literature cited": p. 10. LCCN: gs 53000062 Subjects--Topical Terms: Uranium ores.Geology--Utah--San Juan County. LC Class. No.: QE75 / .C5 no. 217