@book{48743,
	author = {Concepción, Ismael Landrón.},
	title = {The lichen genus Ramalina Ach. in the West Indies with notes on its role in the vegetation of Puerto Rico},
	publisher = {University Microfilms},
	year = {1973.},
	address = {Ann Arbor, Mich.},
	note = {Facsimile produced by microfilm-xerography.}
}