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Lichens and air quality in Three Prairie Parks, Effigy Mounds National Monument-Iowa, Homestead National Monument-Nebraska, Wilson's Creek National Battlefield-Missouri: Final Report.

Wetmore, Clifford M.; Bennett, James P. (1997-06)
This study of the lichens of three prairie parks being studied by the National Park Service was designed 1) to collect lichens for lichen species lists, 2) to collect lichens for elemental analysis, 3) to study the health ...

Catalogue of the lichens of the Falkland Islands.

Wetmore, Clifford M. (1964)

Lichens and air quality in Grand Portage National Monument: Final Report.

Wetmore, Clifford M. (1992-10)
This study of the lichens of Grand Portage National Monument was designed to collect lichens for a lichen flora and for elemental analysis, to study the health and distributions of species most sensitive to air pollution, ...

Lichens and air quality in Hercules Glades Wilderness of Mark Twain National Forest: Final Report.

Wetmore, Clifford M. (1992-06)
This study of the lichens of Hercules Glades Wilderness was designed 1) to collect lichens for a lichen flora census, 2) to collect lichens for elemental analysis, 3) to study the health and distributions of species most ...