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Kerr, Jacqueline, James F. Sallis, Brian E. Saelens, Kelli L. Cain, Terry L. Conway, Lawrence D. Frank, and Abby C. King. Outdoor Physical Activity and Self Rated Health in Older Adults Living in Two Regions of the U.S. BioMed Central, 2012.

Kerr, Jacqueline, et al. Outdoor Physical Activity and Self Rated Health in Older Adults Living in Two Regions of the U.S. BioMed Central, 2012.