Rottana Ladachart. 2002. Area selection for solid waste disposal at Changwat Songkhla. Field of Study Geology, Chulalongkorn University;
Rottana Ladachart. (2002) Area selection for solid waste disposal at Changwat Songkhla . Chulalongkorn University/Bangkok.
Rottana Ladachart. Area selection for solid waste disposal at Changwat Songkhla. . Bangkok:Chulalongkorn University, 2002.
Rottana Ladachart. (2002) Area selection for solid waste disposal at Changwat Songkhla . Chulalongkorn University/Bangkok.