Books by Ralph W. Hansen:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hansen, Ralph W. (Ralph Waldo), 1926-2000: Livestock waste disposal and water pollution control. (Colo. State University/Cooperative Extension Service, 1971) (page images at HathiTrust; US access only)- Hansen, Ralph W. (Ralph Waldo), 1926-2000: Manure harvesting practices : effects on waste characteristics and runoff (Ada, Oklahoma : Environmental Protection Agency, Office of Research and Development, Robert S. Kerr Environmental Research Laboratory, 1976., 1976), also by Ricky A. Kidd, Gerald M. Ward, Marvin L. Stone, Judson M. Harper, Robert S. Kerr Environmental Research Laboratory, Colorado State University, and United States. Environmental Protection Agency. Office of Research and Development (page images at HathiTrust)
Find more by Ralph W. Hansen at your library, or elsewhere.