Krongkarn Bangnarong. (1990) A survey of teachers" problems and needs concerning measurement and evaluation of students" proficiency in English at the upper secondary level in educational region 7. Mahidol University,:ม.ป.ท.Krongkarn Bangnarong. 1990. A survey of teachers" problems and needs concerning measurement and evaluation of students" proficiency in English at the upper secondary level in educational region 7. ม.ป.ท.:Mahidol University,;Krongkarn Bangnarong. A survey of teachers" problems and needs concerning measurement and evaluation of students" proficiency in English at the upper secondary level in educational region 7. ม.ป.ท.:Mahidol University, 1990. Print.