00803cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035002000092040001900112042001200131050002100143060002300164100002900187245013800216260005700354300001100411500009700422700003700519999001700556med47001808 DLC20260227111603.0811121s1947    xx            000 0 eng    amed47001808   a(OCoLC)14658146  aDLCcDNLMdDLC  apremarc00aRJ61b.S636 19470 aWS 113bS646m 19471 aSmith, Esther L.,d1895-10aMother and childb  The official Hay system book on the pre-natal care of the mother, and the care, feeding and training of children.  aMount Pocono, Pa.,bHay system publicationsc[c1947]  a224 p.  aA new edition of The Hay system of child development, by William H. Hay and Esther L. Smith.1 aHay, William Howard,d1866-1940.  c38415d38415