01359nam 2200385Ka 450 991069174200332120020921140944.0(CKB)5470000002347975(OCoLC)50644513ocm50644513(OCoLC)995470000002347975(EXLCZ)99547000000234797520020921d1993 ua 0engtxtrdacontentcrdamediacrrdacarrierPhysical activity and intrinsic motivation[electronic resource] /James R. WhiteheadWashington, DC :President's Council on Physical Fitness and Sports,[1993]Research digest. Series 1 ;no. 2Title from title screen.BackacheHealth aspectsUnited StatesExerciseHealth aspectsUnited StatesPhysical education and trainingHealth aspectsUnited StatesBackacheHealth aspectsExerciseHealth aspectsPhysical education and trainingHealth aspectsWhitehead James R1384116President's Council on Physical Fitness and Sports (U.S.)GPOGPOBOOK9910691742003321Physical activity and intrinsic motivation3429973UNINA