Navavit Ponganan และ Sura Pattanakiat. (2011) Geo-informatics application for environmental health management in tourist of Khao Yai National Park. Mahidol University:ม.ป.ท.Navavit Ponganan และ Sura Pattanakiat. 2011. Geo-informatics application for environmental health management in tourist of Khao Yai National Park. ม.ป.ท.:Mahidol University;Navavit Ponganan และ Sura Pattanakiat. Geo-informatics application for environmental health management in tourist of Khao Yai National Park. ม.ป.ท.:Mahidol University, 2011. Print.