@book{22539,
	author = {Niles, Nathan O. and España Valenzuela, Romero tr.},
	title = {Trigonometría plana.},
	publisher = {LIMUSA  },
	year = {1974.},
	address = {México },
	edition = {3a Ed.},
	note = {Título original publicada por John Wilwy, Plane trigonometry.}
}