TY - JOUR AU - Landman, J; Sive, A; Heese, H D TI - Comparison of enteral and intramuscular vitamin A supplementation in preterm infants JO - Early Hum Dev VL - 30 PY - 1992 DO - 10.1016/0378-3782(92)90143-5 SP - 163 EP - 170 N1 - et al. ER -