Integrated management of paddy and aquatic weeds in Asia : proceedings of the International Seminar "Biological Control and Integrated Management of Paddy and Aquatic Weeds in Asia" : held in Tsukuba, Japan, October 19-25, 1992
Integrated management of paddy and aquatic weeds in Asia : proceedings of the International Seminar "Biological Control and Integrated Management of Paddy and Aquatic Weeds in Asia" : held in Tsukuba, Japan, October 19-25, 1992