1
Published 1984.
Subjects: ';
“...Placer mining Environmental aspects Yukon....”Report Number(s): APA 2628
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2
Published 1983.
Subjects: ';
“...Placer mining Environmental aspects Yukon....”Report Number(s): APA 2647
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3
Published [1982]
Subjects: ';
“...Placer mining Environmental aspects Alaska Interior Alaska....”Report Number(s): APA 3015
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