Pornpan Yongvithisatid. (1997) The accuracy assessment of computer planning system. Mahidol University,:ม.ป.ท.Pornpan Yongvithisatid. 1997. The accuracy assessment of computer planning system. ม.ป.ท.:Mahidol University,;Pornpan Yongvithisatid. The accuracy assessment of computer planning system. ม.ป.ท.:Mahidol University, 1997. Print.