Dam Van Tien 2009 Intensive livestock and environment: current need for educational and research program in Vietnam.  Proceedings MEKARN Workshop on  Livestock, Climate Change and the Environment (Editors: Reg Preston and Vo Lam ), An Giang University, Vietnam, 16-18 November 2009. http://www.mekarn.org/workshops/environ/Abstracts/tien_huaf.htm