@book{113794,
	author = {Puerto Rico. and Vargas, Daniel.},
	title = {Harvesting and marketing of grapefruit in Puerto Rico},
	publisher = {University of Puerto Rico},
	year = {1961.},
	series = {Boletín},
	address = {Río Piedras, Puerto Rico},
	note = {Part in spanish (p. 38-42)}
}