Piyachat Ratana. 2000. Drastic groundwater vulnerability mapping using GIS technology. Filed of Study Information Technology of Natural Resources Management, Bogor Agricultural University;
Piyachat Ratana. (2000) Drastic groundwater vulnerability mapping using GIS technology . Bogor Agricultural University/Bogor.
Piyachat Ratana. Drastic groundwater vulnerability mapping using GIS technology. . Bogor:Bogor Agricultural University, 2000.
Piyachat Ratana. (2000) Drastic groundwater vulnerability mapping using GIS technology . Bogor Agricultural University/Bogor.