Sripan Aunnawetwanich. (1992) Forest information system of Thailand. Mahidol University,:ม.ป.ท.Sripan Aunnawetwanich. 1992. Forest information system of Thailand. ม.ป.ท.:Mahidol University,;Sripan Aunnawetwanich. Forest information system of Thailand. ม.ป.ท.:Mahidol University, 1992. Print.