@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.}
}
