@book{30982,
	author = {Little, Elbert L. and Wadsworth, Frank H.},
	title = {Trees of Puerto Rico and the Virgin Islands},
	publisher = {Department of Agriculture,},
	year = {1964-},
	series = {USDA. Agriculture handbook},
	address = {Washington :},
	note = {La biblioteca tiene: v.1, v.2}
}