00803cam a22002291 4500 med47001808 DLC 20260227111603.0 811121s1947 xx 000 0 eng med47001808 (OCoLC)14658146 DLC DNLM DLC premarc RJ61 .S636 1947 WS 113 S646m 1947 Smith, Esther L., 1895- Mother and child The official Hay system book on the pre-natal care of the mother, and the care, feeding and training of children. Mount Pocono, Pa., Hay system publications [c1947] 224 p. A new edition of The Hay system of child development, by William H. Hay and Esther L. Smith. Hay, William Howard, 1866-1940. 38415 38415