February 19 1971
Steinbrecher, Harold F.
February 19 1971
Steinbrecher, Harold F.
November 22 1971
Steinbrecher, Harold F.
July 21 1970 – July 31 1971
Myhrum, Arthur
May 24 1971
Kroeschell Engineering Co., Myhrum, Arthur
April 21 1971
Kroeschell Engineering Co., Myhrum, Arthur
August 20 1971
California Manufacturing Company
December 21 1970 – May 16 1972
Myhrum, Arthur
1970s
Tyznik, Anthony
October 1971
Tyznik, Anthony
circa 1971
Illinois Department of Public Works and Buildings, Division of Waterways
1970 – 1976
South Dakota Department of Transportation, Office of System Analysis
August 31 1971
Kroeschell Engineering Co.