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1Published 1985Subjects: “...Philosophy of nature....”
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2Published 1972Subjects: “...Nature conservation Congresses....”
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3Published 1995Subjects: “...Philosophy of nature Congresses....”
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4Published 1994Subjects: “...Nature conservation International cooperation Congresses....”
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5Published 1970Subjects: “...Nature Effect of human beings on Congresses....”
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6Published 2012Subjects: “...Philosophy of nature Congresses....”
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7Published 1976Subjects: “...Acoustic phenomena in nature Congresses....”
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8Published 1982Subjects: “...Acoustic phenomena in nature Congresses....”
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9Published 1995Subjects: “...Nature conservation Planning Congresses....”
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10Published 1995Subjects: “...Nature conservation Arctic regions Congresses....”
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11Published 1968Subjects: “...Nature conservation....”
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12Published 1973Subjects: “...Nature conservation Pacific Area Congresses....”
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13Published 1982Subjects: “...Nature and nurture....”
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14Published 1980Subjects: “...Nature (Aesthetics) Congresses....”
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15Published 1999Subjects: “...Nature and nurture Congresses....”
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16Published 1994Subjects: “...Nature conservation Congresses....”
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17by Kellogg, William W.Subjects: “...Nature Effect of human beings on....”
Published 1972
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18Published 1971Subjects: “...Nature Effect of human beings on....”
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19Published 2008Subjects: “...Nature conservation Congresses....”
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20Published 1973Subjects: “...Nature conservation Congresses....”
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