R C Eklund1, J R Whitehead, G J Welk. 1. Department of Health, Physical Education, and Recreation, University of North Dakota, USA. reklund@badlands.nodak.edu
Authors: Peter Crocker; Catherine Sabiston; Shannon Forrestor; Nanette Kowalski; Kent Kowalski; Meghan McDonough Journal: Can J Public Health Date: 2003 Sep-Oct