September 11 1972
Steinbrecher, Harold F.
March 7 1972
Steinbrecher, Harold F.
1972 – 1977
Clark, Dietz & Associates, Engineers, Inc.
February 7 1972
Kroeschell Engineering Co., Myhrum, Arthur
1972
American Association of Petroleum Geologists
1970 – 1976
South Dakota Department of Transportation, Office of System Analysis