@book{116189,
	author = {Díaz Berdecía, Nelson,},
	title = {The relationship between the degree of bilingualism and competence vs. performance of Puerto Rican children in the acquisition of conservation},
	publisher = {The Author},
	year = {1982.},
	address = {Philadelphia, Penn.},
	note = {Thesis (Ph.D.)--Temple University-Philadelphia.}
}