Le Huu Khuong and Duong Nguyen Khang 2005 Effect of fresh cassava foliage on growth and faecal nematode egg counts in Sindhi x Yellow cattle fed urea-treated rice straw basal diet.  Workshop-seminar "Making better  use of local feed resources" (Editors: Reg Preston and Brian Ogle) MEKARN-CTU, Cantho, 23-25 May, 2005. Article #18. Retrieved, from http://www.mekarn.org/proctu/khan18.htm