Prapatsorn Chumsri. (1989) Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data. Mahidol University,:ม.ป.ท.Prapatsorn Chumsri. 1989. Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data. ม.ป.ท.:Mahidol University,;Prapatsorn Chumsri. Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data. ม.ป.ท.:Mahidol University, 1989. Print.