AU  - Marcus BH, Lewis BA, Williams DM, et al
TI  - A comparison of internet and print-based physical activity interventions
PT  - JOUR
DP  - 2007
TA  - Archives of Internal Medicine
pages = {944-949},
VI  - 167
IP  - 9
AID  - 10.1001/archinte.167.9.944 [doi]
4100  - http://dx.doi.org/10.1001/archinte.167.9.944
SO  - Archives of Internal Medicine May 14, 2007 167(9):944