Rana และ Digbijaya Shamsher J.B. (1993) Low birthweight babies : a case-control study of maternal risk factors in a Bangkok maternity hospital. Mahidol University,:ม.ป.ท.Rana และ Digbijaya Shamsher J.B. 1993. Low birthweight babies : a case-control study of maternal risk factors in a Bangkok maternity hospital. ม.ป.ท.:Mahidol University,;Rana และ Digbijaya Shamsher J.B. Low birthweight babies : a case-control study of maternal risk factors in a Bangkok maternity hospital. ม.ป.ท.:Mahidol University, 1993. Print.