Mills, JL, Simpson, JL, Cunningham, GC et al. (1997). Vitamin A and birth defects
. AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 177(1), 31-36. 10.1016/S0002-9378(97)70434-4
Mills, JL, Simpson, JL, Cunningham, GC et al. (1997). Vitamin A and birth defects
. AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 177(1), 31-36. 10.1016/S0002-9378(97)70434-4