@book{114503,
	author = {Gega, Peter C.},
	title = {La enseñanza de las ciencias fisicas en la escuela primaria},
	publisher = {Ediciones Paidós Ibérica},
	year = {1980.},
	series = {Serie Didáctica Fundamental},
	address = {Barcelona},
	note = {Translation of : Science in elementary education.}
}