Luu Huu Manh, Nguyen Nhut Xuan Dung , Ngo Ngoc Hung and Lam Kim Ngan 2009 Vegetable by-product disposal and animal manures as a feed source to raise earth worm (Perionyx excavatus). 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/mhan01.htm