Geological Survey (U.S.)
Gerdine, T. G. (Thomas Golding), 1872-1930.
Witherspoon, D. C.
Schrader, Frank C. (Frank Charles), 1860-1944.
U.S. Coast and Geodetic Survey.
United States. Army.
U.S. Geological Survey ; topography by T.G. Gerdine and D.C. Witherspoon ; F.C. Schrader, geologist in charge.