1
Published 1976.
Subjects: ';
“...Water Pollution....”Report Number(s): APA 352 APA 435 SUS 229
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2
Subjects: ';
“...Freshwater fishes Effect of water pollution on Pennsylvania Codorus Creek, West Branch....”
Report Number(s): SUS 5010
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3
Published [1979]
Subjects: ';
“...Water-supply Management....”Report Number(s): SUS 125
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