Ponson Chernkwansri. 2009. Geographic information system application for risk area assessment on natural gas pipeline construction in Nakhon Nayok province, Thailand. Faculty of Environment and Resource Studies, Mahidol University;
Ponson Chernkwansri. (2009) Geographic information system application for risk area assessment on natural gas pipeline construction in Nakhon Nayok province, Thailand . Mahidol University/Bangkok.
Ponson Chernkwansri. Geographic information system application for risk area assessment on natural gas pipeline construction in Nakhon Nayok province, Thailand. . Bangkok:Mahidol University, 2009.
Ponson Chernkwansri. (2009) Geographic information system application for risk area assessment on natural gas pipeline construction in Nakhon Nayok province, Thailand . Mahidol University/Bangkok.