@book{153620,
	author = {Grotkasten, Silke.},
	title = {Gimnasia para la columna vertebral},
	publisher = {Editorial Paidotribo},
	year = {1996.},
	series = {Coleccion Cuerpo sano},
	address = {Barcelona},
	edition = {4. ed.},
	note = {Translation of: Wirbelsäulen-gymnastik.}
}