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1
Mineral resources and the environment : a report /
Published 1975
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2
Conservation in the United States /
by Gustafson, A. F. 1880-1949.
Published 1949
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3
In command of tomorrow : resource and environmental strategies for Americans /
by Brubaker, Sterling.
Published 1975
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4
The conservation of natural resources in the United States /
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5
The Foundations of national prosperity ; studies in the conservation of permanent national resources /
Published 1917
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6
Earth Day - the beginning ; a guide for survival /
Published 1970
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8
Conservation of natural resources /
by Smith, Guy-Harold, 1895-1976.
Published 1971
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9
Alaska ; a challenge in conservation /
by Cooley, Richard A.
Published 1967
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10
Dams, parks & politics ; resource development & preservation in the Truman-Eisenhower era /
by Richardson, Elmo.
Published 1973
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11
The politics of development ; forests, mines & hydro-electric power in Ontario, 1849-1941 /
by Nelles, H. V.
Published 1974
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12
Hour of trial : the conservation conflict in Colorado and the West, 1891-1907 /
by McCarthy, Michael, 1940-
Published 1977
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13
Mineral industries education.
by Steidle, Edward, 1887-1977.
Published 1950
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14
Federal conservation policy, 1921-1933.
by Swain, Donald C.
Published 1963
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15
Conservation for survival ; an ecological strategy.
by Curry-Lindahl, Kai.
Published 1972
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17
Ecology in theory and practice /
Published 1973
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19
Pollution, resources, and the environment /
by Enthoven, Alain C., 1930-
Published 1973
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20
Environmental geomorphology and landscape conservation /
by Coates, Donald Robert, 1922-
Published 1972
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