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1
A land policy program for Pennsylvania : [a final policy report] /
Published 1978
Book
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2
Coastal waters : a management analysis /
by Armstrong, John M. 1936-2004.
Published 1978
Book
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3
Land, wood, and water /
by Kerr, Robert S. 1896-1963.
Published 1960
Book
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5
The mountain /
by Parnall, Peter.
Published 1971
Book
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6
Pennsylvania soil and water conservation needs inventory.
Published 1968
Book
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7
Progressive politics and conservation ; the Ballinger-Pinchot affair /
by Penick, James L., Jr.
Published 1968
Book
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8
Six steps to a sustainable society /
by Brown, Lester R. 1934-
Published 1982
Book
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9
Rich land, poor land ; a study of waste in the natural resources of America /
by Chase, Stuart, 1888-1985.
Published 1936
Book
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10
Global future : time to act : report to the President on global resources, environment and population /
Published 1981
Government Document Book
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11
The diligent destroyers.
by Laycock, George.
Published 1970
Book
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12
The environmental revolution ; a guide for the new masters of the world.
by Nicholson, Max.
Published 1970
Book
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13
Congress and the environment /
Published 1970
Book
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14
Conservation of natural resources /
by Smith, Guy-Harold, 1895-1976.
Published 1971
Book
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15
Man's dominion ; the story of conservation in America /
by Graham, Frank, 1925-
Published 1971
Book
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16
The earth as modified by human action.
by Marsh, George P. 1801-1882.
Published 1970
Book
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17
Use and conservation of the biosphere ; proceedings.
Published 1970
Conference Proceeding Book
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18
Governing nature.
by Murphy, Earl Finbar, 1928-
Published 1967
Book
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19
Deserts on the march /
by Sears, Paul B. 1891-1990.
Published 1967
Book
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