Wetmore CM. Lichens and air quality in Voyageurs National Park. Final Report, chemical analysis supplement. 1984:1-9.
1 PDF computer file (6 pages plus 3 pages of tabular data)
National Park Service
Contract CX 0001-2-0034
Wetmore, Clifford M..
Lichens and air quality in Voyageurs National Park: Final report, chemical analysis supplement.
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