Yupin Peetragorn. 1995. Assessment of water quality by means of phenolic compounds around Chiang Mai city. Chiang Mai:Chiang Mai University;
Yupin Peetragorn. (1995) Assessment of water quality by means of phenolic compounds around Chiang Mai city (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.
Yupin Peetragorn. Assessment of water quality by means of phenolic compounds around Chiang Mai city. Chiang Mai:Chiang Mai University, 1995.
Yupin Peetragorn. (1995) Assessment of water quality by means of phenolic compounds around Chiang Mai city (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.