@book{293643,
	author = {Grotkastein, Silke and Kienzerle, Hubert},
	title = {Gimnasia para la columna vertebral / Silke Grotkasten, Hubert Kienzerle},
	publisher = {Paidotribo},
	year = {1998},
	address = {Barcelona},
	edition = {6a ed.}
}