circa 1960 – 1979
Helmick, William K.
1970s
Knoedler, Bob
20th century
Savage, John S.
Beasley, Michael
Stickney, William S.
1960 – 1979
circa 1970 – 1989
September 1979
November 29 1979
Steinbrecher, Harold F.
1979
U.S. Soil Conservation Service
February 1979
Keiser Associates
Tyznik, Anthony