@book{68225,
	author = {Hale, Mason E., Jr.},
	title = {A monograph of the lichen genus Parmeliacea ascharius sensu stricto (Ascomycotina : Parmeliaceae)},
	publisher = {Smitsonian Institution,},
	year = {1987},
	series = {Smithsonian contributions to botany},
	address = {Washington :},
	note = {27-108}
}