@book {47,
	title = {The Lichen Flora of Great Britian and Ireland},
	year = {1992},
	publisher = {Natural History Museum Publications},
	organization = {Natural History Museum Publications},
	address = {London},
	author = {O.W. Purvis and D.M. Moore and B.J. Coppins and D.L. Hawksworth and P.W. James}
}
@book {628,
	title = {Studies in Pseudocyphellaria (lichens) III. The South American Species},
	year = {1992},
	publisher = {J. Cramer},
	organization = {J. Cramer},
	address = {Berlin and Stuttgart},
	author = {David J. Galloway}
}
