Chatchatchai Pitayanon และผู้แต่งคนอื่นๆ. (2009) A study on climatic conditions, body temperature and cardiovascular response during outdoor exercise in physical education class in the schoolboys of Chulalongkorn University Demonstration Elementary School. Chulalongkorn University:ม.ป.ท.Chatchatchai Pitayanon และผู้แต่งคนอื่นๆ. 2009. A study on climatic conditions, body temperature and cardiovascular response during outdoor exercise in physical education class in the schoolboys of Chulalongkorn University Demonstration Elementary School. ม.ป.ท.:Chulalongkorn University;Chatchatchai Pitayanon และผู้แต่งคนอื่นๆ. A study on climatic conditions, body temperature and cardiovascular response during outdoor exercise in physical education class in the schoolboys of Chulalongkorn University Demonstration Elementary School. ม.ป.ท.:Chulalongkorn University, 2009. Print.