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5Proposed additions to the National Wilderness Preservation System, Communication from the President.Published 1974Subjects: “...Conservation of natural resources....”
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7Published 2000Subjects: “...National Conservation Association (U.S.)...”
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8Published 1979Subjects: “...Conservation of natural resources....”
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9Published 1979Subjects: “...Conservation of natural resources....”
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13Published 2004Subjects: “...Conservation of natural resources Law and legislation Northeastern States....”
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15Published 1996Subjects: “...Natural resources conservation areas Colorado....”
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16Published 2000Subjects: “...Conservation of natural resources Colorado White River National Forest....”
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17Published 2000Subjects: “...Water conservation Law and legislation Texas....”
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18Published 1984Subjects: “...Soil conservation Colorado River Watershed (Colo.-Mexico)...”
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20Published 2003Subjects: “...Water conservation Law and legislation West (U.S.)...”
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