Wetmore, Clifford M.2014-07-082014-07-081988-12Wetmore CM. Lichens and air quality in Pictured Rocks National Lakeshore. Final Report. 1988:1-38https://hdl.handle.net/11299/1638061 PDF computer file (25 pages; 1 picture plus 2 pages of tabular data and 14 pages of maps)en-USLichensAir qualityReport