00393nam a22001217a 4500008004100000020001500041082002500056100002700081245007600108250001400184260005000198300002300248140118b        xxu||||| |||| 00| 0 eng d  a9710829548  aCir. 155 H939bc1980  aHurlock, Elizabeth B.   aDevelopmental psychology : a life-span approach cElizabeth B. Hurlock   a5th. Ed.   aNew York :bMcGraw- Hill Book Company,cc1980  axiv, 477p. :bill.