TY  - BOOK
AU  - Byl, John
TI  - 	Having a ball : stability ball gams
SN  - 978-0-7360-7254-0
U1  - Circ. 613.710284 B993h 2008 
PY  - 2008///
CY  - Champaign Ill.
PB  - Human Kinetics
KW  - 1. Exercise
KW  - 2. Swiss exercise balls
ER  -