TY - JOUR TI - Understanding environmental influences on nutrition and physical activity behaviors: where should we look and what should we count? JF - International Journal of Behavioral Nutrition and Physical Activity AU - Ball, Kylie AU - Timperio, Anna F AU - Crawford, David A DO - 10.1186/1479-5868-3-33 PY - 2006 SP - 33 SN - 14795868 IS - 1 VL - 3 ER -