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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