Autor:
Mavis B; Office of Medical Education Research and Development, Michigan State University, East Lansing, MI 48824-1316, USA. mavis@msu.edu,
Pearson R,
Stewart G,
Keefe C
Publikováno v:
The Journal of school health [J Sch Health] 2009 Jun; Vol. 79 (6), pp. 262-8.