1973 – 1974
Helmick, William K.
1970s
Knoedler, Bob
March 11 1970
Steinbrecher Jr., Harold F.
July 21 1970 – February 7 1971
May 24 1971
Kroeschell Engineering Co.
May 24 1971
Kroeschell Engineering Co.
February 16 – March 17 1972
California Manufacturing Company
February 16 – March 17 1972
California Manufacturing Company
August 31 1971
Kroeschell Engineering Co.
March 22 1973
C. L. Doucette, Inc.
March 22 1973
C. L. Doucette, Inc.
December 11 1978
Keiser Associates
March 28 1982
C. Edward Ware Associates, Inc.
circa 1970
Tyznik, Anthony
1976
Coulter, Ronald M.