Wipha Osatharayakul. 1999. Risk assessment of water and soil contamination by Mae-Hia solid waste disposal site in Chiang Mai province. Field of Study Environmental Science, Chiang Mai University;
Wipha Osatharayakul. (1999) Risk assessment of water and soil contamination by Mae-Hia solid waste disposal site in Chiang Mai province . Chiang Mai University/Chiang Mai.
Wipha Osatharayakul. Risk assessment of water and soil contamination by Mae-Hia solid waste disposal site in Chiang Mai province. . Chiang Mai:Chiang Mai University, 1999.
Wipha Osatharayakul. (1999) Risk assessment of water and soil contamination by Mae-Hia solid waste disposal site in Chiang Mai province . Chiang Mai University/Chiang Mai.