@book{437,
	author = {Pérez Sánchez, Alfredo. and Donoso Siña, Enrique.},
	title = {Obstetricia /  },
	publisher = {Mediterraneo;},
	year = {1999.},
	address = {Santiago de Chile [Chile]: },
	edition = {3a ed.},
	note = {Pérez Sánchez, A. y Donoso Siña, E. (1999). Obstetricia. (3a ed.). Santiago de Chile [Chile] : Mediterráneo.}
}