@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}
}
@article {104,
	title = {A New Name for <em> Dictyonema pavonium </em> (Swartz) Parmasto},
	journal = {The Lichenologist},
	volume = {20},
	number = {1},
	year = {1988},
	pages = {101},
	chapter = {101},
	author = {D.L. Hawksworth}
}
