Orawan Makemaharn. (1994) Investigation of specific index for prenatal diagnosis of neural tube defects and other affected pregnancies. Mahidol University,:ม.ป.ท.Orawan Makemaharn. 1994. Investigation of specific index for prenatal diagnosis of neural tube defects and other affected pregnancies. ม.ป.ท.:Mahidol University,;Orawan Makemaharn. Investigation of specific index for prenatal diagnosis of neural tube defects and other affected pregnancies. ม.ป.ท.:Mahidol University, 1994. Print.