@book{1806,
	author = {Mateus Campos, Aleida and Gutierrez Avila, Helver E.},
	title = {Diez Talleres de Autoestudio en Matematicas para el Grado Séptimo /},
	publisher = {UNILLANOS,},
	year = {1995.},
	address = {Villavicencio :}
}