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Prayuth Sangsurin. (1992) Training model development for Tambon development managers in land reform area-Ubonratchathani . Khon Kaen University/Khon Kaen.
Prayuth Sangsurin. Training model development for Tambon development managers in land reform area-Ubonratchathani. . Khon Kaen:Khon Kaen University, 1992.
Prayuth Sangsurin. (1992) Training model development for Tambon development managers in land reform area-Ubonratchathani . Khon Kaen University/Khon Kaen.