Parisa Nimnate และ Vichai Chutakositkanon. (2012) History of sea-levil change of pak nam chumphon area, amphoe muang, changwat champhon. Chulalongkorn University:ม.ป.ท.Parisa Nimnate และ Vichai Chutakositkanon. 2012. History of sea-levil change of pak nam chumphon area, amphoe muang, changwat champhon. ม.ป.ท.:Chulalongkorn University;Parisa Nimnate และ Vichai Chutakositkanon. History of sea-levil change of pak nam chumphon area, amphoe muang, changwat champhon. ม.ป.ท.:Chulalongkorn University, 2012. Print.