Pichit Rukthamsangob. 2006. Proper conditions on developing phosphogypsum to compensate for natural gypsum. Field of Study Appropriate Technology for Resources and Environmental Development, Mahidol University;
Pichit Rukthamsangob. (2006) Proper conditions on developing phosphogypsum to compensate for natural gypsum . Mahidol University/Bangkok.
Pichit Rukthamsangob. Proper conditions on developing phosphogypsum to compensate for natural gypsum. . Bangkok:Mahidol University, 2006.
Pichit Rukthamsangob. (2006) Proper conditions on developing phosphogypsum to compensate for natural gypsum . Mahidol University/Bangkok.