@article {127,
	title = {The Genus Leptogium in North America North of Mexico},
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	year = {1964},
	pages = {245-317},
	chapter = {245},
	url = {http://www.jstor.org/stable/pdfplus/3240893.pdf},
	author = {Herbert A. Sierk}
}
@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.}
}
@book {1453,
	title = {Lichens},
	series = {The new naturalist},
	year = {2000},
	pages = {288},
	publisher = {HarperCollins},
	organization = {HarperCollins},
	address = {London},
	isbn = {0002200821},
	author = {Oliver Gilbert}
}
@article {1186,
	title = {Microhabitat affinities of Missouri Ozarks Lichens},
	journal = {The Bryologist},
	volume = {107},
	number = {1},
	year = {2004},
	pages = {47-61},
	author = {JeriLynn E. Peck and Jennifer Grabner and Douglas Ladd and David R. Larson}
}
@article {1155,
	title = {Cyanolichens of the Galapagos Islands- The genera Collema and Leptogium},
	journal = {Sauteria},
	volume = {15},
	year = {2008},
	pages = {139-158},
	chapter = {139},
	author = {Frank Bungartz}
}
@article {732,
	title = {Index Fungorum [taxonomy information]},
	year = {2008},
	url = {http://www.indexfungorum.org/Names/Names.asp}
}
@book {1154,
	title = {The Macrolichens of New England},
	series = {Memoirs of the New York Botanical Garden},
	volume = {96},
	year = {2007},
	publisher = {The New York Botanical Garden Press},
	organization = {The New York Botanical Garden Press},
	address = {China},
	author = {James W. Hinds and Patricia L. Hinds}
}
