@book{10801,
	author = {Cofré Ovalle, Jorge and Soto Muñoz, Margarita Cecilia,},
	title = {Norma Chilena NCh 1934.Of92 [titulo]},
	editor = {Escuela de Construcción Civil},
	publisher = {Universidad Tecnológica Metropolitana,},
	year = {1996.},
	address = {Santiago :}
}