Wetmore CM. Lichens and air quality in Delaware Water Gap Recreation Area. Final Report. 1987:1-39.
1 PDF computer file (31 pages; 4 pages of tabular data, 9 maps)
National Park Service
Contract CX 0001-2-0034
Wetmore, Clifford M..
Lichens and air quality in Delaware Water Gap Recreation Area: Final Report.
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