Supachai Skawsang. 2003. The application of geographic information system and remote sensing to the distribution of earthworms in Ong Chu-Na Suan subwatershed Srisawasdi district Kanchanaburi province. Field of Study Appropriate Technology for Resources and Environmental Development, Mahidol University;
Supachai Skawsang. (2003) The application of geographic information system and remote sensing to the distribution of earthworms in Ong Chu-Na Suan subwatershed Srisawasdi district Kanchanaburi province . Mahidol University/Bangkok.
Supachai Skawsang. The application of geographic information system and remote sensing to the distribution of earthworms in Ong Chu-Na Suan subwatershed Srisawasdi district Kanchanaburi province. . Bangkok:Mahidol University, 2003.
Supachai Skawsang. (2003) The application of geographic information system and remote sensing to the distribution of earthworms in Ong Chu-Na Suan subwatershed Srisawasdi district Kanchanaburi province . Mahidol University/Bangkok.