Books by Kjell Christophersen:
Books in the extended shelves:
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Christophersen, Kjell: An analysis of attitudes and opinions of St. Joe River basin landowners towards wild and scenic rivers (Water Resources Research Institute, University of Idaho, 1972), also by Idaho Water Resources Research Institute (page images at HathiTrust)- Christophersen, Kjell: Attitudes and opinions of recreationists towards wild and scenic rivers : a case study of the St. Joe River (Water Resources Research Institute, University of Idaho, 1973), also by Idaho Water Resources Research Institute (page images at HathiTrust)
Find more by Kjell Christophersen at your library, or elsewhere.