Areerat Niyomsup. 2006. The development of learning unit on forest utilization : a case of Huay-Phak community, Ratchaburi province. Field of Study Environmental Education, Mahidol University;

Areerat Niyomsup. The development of learning unit on forest utilization : a case of Huay-Phak community, Ratchaburi province. . Bangkok:Mahidol University, 2006.

Areerat Niyomsup. (2006) The development of learning unit on forest utilization : a case of Huay-Phak community, Ratchaburi province . Mahidol University/Bangkok.