Orapin Watchawong. 1996. Quantitative survey and habitat assessment of macroinvertebrates to assess water quality in running waters. Graduate School, Chiang Mai University;
Orapin Watchawong. (1996) Quantitative survey and habitat assessment of macroinvertebrates to assess water quality in running waters . Chiang Mai University/Chiang Mai.
Orapin Watchawong. Quantitative survey and habitat assessment of macroinvertebrates to assess water quality in running waters. . Chiang Mai:Chiang Mai University, 1996.
Orapin Watchawong. (1996) Quantitative survey and habitat assessment of macroinvertebrates to assess water quality in running waters . Chiang Mai University/Chiang Mai.