AU  - Harris SS, Caspersen CJ, DeFriese GH, Estes E, Jr
TI  - COunseling about physical activity-reply
PT  - JOUR
DP  - 1989
TA  - JAMA
pages = {3407},
VI  - 262
IP  - 24
AID  - 10.1001/jama.1989.03430240040020 [doi]
4100  - http://dx.doi.org/10.1001/jama.1989.03430240040020
SO  - JAMA December 22, 1989 262(24):3407