Loken, Newton C. The complete book of gymnastics/ Newton C. Loken - New jersey : Prentice-hall, inc. ; c1977. - x, 326 pages : 25 cm. Includes selected list of ref. mat. and visuall aids and index ISBN: 0-13-157172-9 Dewey Class. No.: Circ. 796.4 L836 c.1 1977