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1by Robinson, John P.Subjects: “...Human ecology United States....”
Published 1991
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2by Campbell, C. L. (C. Lee)Subjects: “...Agricultural ecology United States....”
Published 1994
Government Document Microform Book -
3by Campbell, C. L. (C. Lee)Subjects: “...Agricultural ecology United States....”
Published 1994
Government Document Microform Book -
4by Robinson, John P.Subjects: “...Human ecology United States....”
Published 1992
Government Document Book -
5Published 1990Subjects: “...Wetland ecology United States....”
Government Document Book -
6Published 1994Subjects: “...Agricultural ecology United States....”
Government Document Microform Book -
7Published 1994Subjects: “...Landscape ecology United States....”
Government Document Microform Book -
8by Franson, Susan E., 1953-Subjects: “...Agricultural ecology United States....”
Published 1994
Government Document Book -
9by Campbell, C. L. (C. Lee)Subjects: “...Agricultural ecology United States. http://id.loc.gov/authorities/subjects/sh2009114149...”
Published 1994
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