@book{20267,
	author = {Puerto Rico. and McCroskey, Ward C.,},
	title = {Course of study for the high schools of Porto Rico,},
	publisher = {Bureau of supplies, printing and transportation,},
	year = {1918.},
	series = {Bulletin,},
	address = {San Juan, P.R.,},
	note = {At head of title: Government of Porto Rico. Department of education ...}
}