00320nam a22001337a 4500015000800000041000800008080000900016100002000025100002000045245003100065260006900096300000800165999001300173 a395 aENG a613  cRay. J. Sheperd aRay. J. Sheperd aPhysical activity & Growth aYear Book Medical publishersbYear Book Medical publishersc1982 a340 c255d255