@article {653,
	title = {The Lichen Family Heppiaceae in North America},
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	number = {2},
	year = {1970},
	pages = {158-209},
	chapter = {158},
	url = {http://www.jstor.org/stable/pdfplus/2395109.pdf},
	author = {Wetmore, Clifford M.}
}
@article {1257,
	title = {The Lichen Genus Nephroma in North and Middle America},
	journal = {Publications of the museum Michigan State University},
	year = {1960},
	author = {Wetmore, Clifford M.}
}
@article {719,
	title = {A New Species of Nephroma from North America},
	journal = {The Bryologist},
	volume = {83},
	number = {2},
	year = {1980},
	pages = {243-247},
	author = {Wetmore, Clifford M.}
}
@article {1187,
	title = {Macrolichens of Big Bend National Park, Texas},
	journal = {The Bryologist},
	volume = {79},
	number = {3},
	year = {1976},
	pages = {296-313},
	author = {Wetmore, Clifford M.}
}
