Sovanny Sreng และ Niti Pawakapan. (2014) Sand Mining and Villagers' livelihood in Prek Angkun village of Koh Kong city, Cambodia. Chulalongkorn University:ม.ป.ท.Sovanny Sreng และ Niti Pawakapan. 2014. Sand Mining and Villagers' livelihood in Prek Angkun village of Koh Kong city, Cambodia. ม.ป.ท.:Chulalongkorn University;Sovanny Sreng และ Niti Pawakapan. Sand Mining and Villagers' livelihood in Prek Angkun village of Koh Kong city, Cambodia. ม.ป.ท.:Chulalongkorn University, 2014. Print.