@inbook {4647,
	title = {Protoparmelia},
	booktitle = {Lichen Flora of the Greater Sonoran Desert Region},
	volume = {2},
	year = {2004},
	pages = {425-430},
	publisher = {Lichens Unlimited},
	organization = {Lichens Unlimited},
	address = {Tempe, Arizona},
	author = {Ryan, B.D. and Nash, T.H. and Hafellner, J.}
}
@article {4221,
	title = {The Buellia aethalea-group in the Greater Sonoran Desert Region with reference to similar species in North America},
	journal = {Bryologist},
	volume = {107},
	year = {2004},
	pages = {441-458},
	issn = {0007-2745},
	doi = {10.1639/0007-2745(2004)107[441:TBAITG]2.0.CO;2},
	url = {http://www.bioone.org/doi/abs/10.1639/0007-2745\%282004\%29107\%5B441\%3ATBAITG\%5D2.0.CO\%3B2},
	author = {Bungartz, F. and Nash, T.H.}
}
@book {3393,
	title = {Lichen Flora of the Greater Sonoran Desert Region},
	volume = {2},
	year = {2001},
	publisher = {Arizona State University},
	organization = {Arizona State University},
	address = {Tempe, Arizona, USA},
	author = {Nash, T.H. and Ryan, B.D. and Gries, C. and Bungartz, F.}
}
@inbook {2055,
	title = {Caloplaca},
	booktitle = {Lichen Flora of the Greater Sonoran Desert},
	volume = {3},
	year = {2007},
	pages = {179-220},
	publisher = {Lichens Unlimited},
	organization = {Lichens Unlimited},
	address = {Tempe, Arizona},
	author = {Wetmore, C.M.},
	editor = {Nash, T.H. and Gries, C. and Bungartz, F.}
}
