Prapatsorn Chumsri. 1989. Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data. Faculty of Graduate Studies, Mahidol University;
Prapatsorn Chumsri. (1989) Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data . Mahidol University/Bangkok.
Prapatsorn Chumsri. Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data. . Bangkok:Mahidol University, 1989.
Prapatsorn Chumsri. (1989) Agro-ecological zoning in the Southeast coast of Thailand using climatic and soil data . Mahidol University/Bangkok.