@book{213691,
	author = {Giol Soldevilla, Isidro and Goyanes y Soldevilla, José},
	title = {Curso elemental de topografía / Isidro Giol Soldevilla},
	publisher = {Librería de la Viuda de Hernando},
	year = {1891},
	address = {Madrid},
	edition = {7a ed.}
}