00577nam a2200169Ia 4500008004100000040001900041041001200060082002700072100002100099245009200120260004600212300002200258504005800280650002500338700002300363850002100386131103s9999    xx            000 0 und d  aLoreto College  aEnglish  a372.21/HARbLCBED/1518  aHartley, Ruth E.  aUnderstanding children's playcRuth E. Hartley, Lawrence K. Frank & Robert M. Goldenson  aNew YorkbColumbia University pressc1967  axv,372p. c 22cm.  aIncludes,appendix  bibliographical references & index  aElementary education  aFrank, Lawrence K.  aLCBED/372.21/HAR