Changes in neighborhood walking are related to changes in perceptions of environmental attributes
Author: Humpel, Nancy.  Published in: Annals of Behavioral Medicine, v. 27  no. 1, pp. 60- 67  Date: 2004
ISSN:  0883-6612,  EISSN:  1532-4796  DOI:  10.1207/s15324796abm2701_8