00327nam a2200097 a 450000500170000008200200001710000230003724501090006026000380016930000220020720251203091610.0  a615.82,bD, ski  aSkinner, James, S.  aExercise testing and exercise prescription for special cases: theoretical basis and clinical application  aPhiladelphiabLea & Febigerc1987  axii, 314p, 24 cm.