@article {2979,
	title = {Bark Factors Affecting the Distribution of Corticolous Bryophytic Communities},
	journal = {The American Midland Naturalist},
	volume = {20},
	year = {1938},
	note = {Illustrations, Maps},
	month = {September},
	pages = {302-330},
	keywords = {Flora, Liverworts, Mosses, Trees},
	author = {Billings, W. D and Drew, William B}
}
