Osterkamp, W. R.
[Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey ; Alexandria, VA : For sale by the Distribution Branch, USGS, 1983.
1983
Osterkamp, W. R.
[Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey ; Alexandria, Va. : For sale by the Branch of Distribution, U.S. Geological Survey, 1982.
1982