Wetmore CM. Lichens and air quality in the Apostle Islands National Lakeshore. Final Report. 1988:1-43.
28 pages plus 13 pages of maps.
National Park Service, Contract CX 0001-2-0034 and USDI-PX6000-7-073l
Wetmore, Clifford M..
Lichens and air quality in Apostle Islands National Lakeshore: final report.
National Park Service.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.