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1Published 1980Subjects: “...Swamp ecology North Carolina....”
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6Survey, ecology, and systematics of the Upper Potomac estuary biota : aufwuchs microfauna : phase I.by Spoon, Donald M.Subjects: “...Estuarine ecology....”
Published 1975
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8Published 1975Subjects: “...Lake ecology....”
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17Published 1976Subjects: “...Agricultural ecology Congresses....”
Conference Proceeding Book -
18Published 1981Subjects: “...Valley ecology White Clay Creek Watershed....”
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