Bussakorn Pongorapin. 1998. Application of computer programs to some coal quality modeling at Sin Pun deposit, Changwat Nokhon Si Thammarat and Saba Yoi deposit, Changwat Songkhla. Graduate School, Chulalongkorn University;
Bussakorn Pongorapin. (1998) Application of computer programs to some coal quality modeling at Sin Pun deposit, Changwat Nokhon Si Thammarat and Saba Yoi deposit, Changwat Songkhla . Chulalongkorn University/Bangkok.
Bussakorn Pongorapin. Application of computer programs to some coal quality modeling at Sin Pun deposit, Changwat Nokhon Si Thammarat and Saba Yoi deposit, Changwat Songkhla. . Bangkok:Chulalongkorn University, 1998.
Bussakorn Pongorapin. (1998) Application of computer programs to some coal quality modeling at Sin Pun deposit, Changwat Nokhon Si Thammarat and Saba Yoi deposit, Changwat Songkhla . Chulalongkorn University/Bangkok.