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Changing the ACP investment
Easter, K. William - In: Land economics : applied research on environmental resources 45 (1969) 2, pp. 218-228
Persistent link: https://www.econbiz.de/10002087002
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The land renewed : the story of soil conservation
Dersal, William Richard van - 1968 - Rev. and enl. ed
Persistent link: https://www.econbiz.de/10002087086
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Drainage intensity in Western New York
Donahue, John J. - In: Annals of the Association of American geographers 62 (1972) 1, pp. 23-36
Persistent link: https://www.econbiz.de/10002087973
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The Missouri : A great river basin of the United States. Its resources and how we are using them.
1958
Persistent link: https://www.econbiz.de/10002298170
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The Water Crisis : Forew. by Paul H. Douglas
Moss, Frank E. - 1968 - (2. print)
Persistent link: https://www.econbiz.de/10002298727
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Amerikanske jordvernproblemer : inntrykk fra en studiereise i USA
Løddesøl, Aasulv - 1952
Persistent link: https://www.econbiz.de/10002255748