@book{12523,
	author = {McAlpine, John D.},
	title = {Agricultural production and trade of Puerto Rico},
	publisher = {U.S. Dept. of Agriculture, Economic Research Service, Foreign Regional Analysis Division},
	year = {[1968]},
	series = {[United States. Dept. of Agriculture. Economic Research Service] ERS-foreign},
	address = {Washington]}
}