Aroonsri Lieosuwan. (1991) Assessment of reliability in conventional methods for cobalt-60 output calibration. Mahidol University,:ม.ป.ท.Aroonsri Lieosuwan. 1991. Assessment of reliability in conventional methods for cobalt-60 output calibration. ม.ป.ท.:Mahidol University,;Aroonsri Lieosuwan. Assessment of reliability in conventional methods for cobalt-60 output calibration. ม.ป.ท.:Mahidol University, 1991. Print.