@book{50919,
	author = {Proctor, George R.},
	title = {Ferns of Puerto Rico and the Virgin Islands},
	publisher = {New York Botanical Garden},
	year = {c1989.},
	series = {Memoirs of the New York Botanical Garden},
	address = {Bronx, N.Y., U.S.A.},
	note = {"Issued 6 December 1989."}
}