00410nam a22001457i 4500001001000000005001700010008004100027082002100068100001900089245006800108250001000176260004000186300001700226650002100243SXC00258120260819093328.0260101s1950    ii            000 0 eng d  a155.4 VAL-D5222  aValentine, C W10aDifficult child and the problem of discipline /cValentine, C W  a5 ed.  abMethuen & Co. Ltd., London,c1950  ap. ;c22 cm. 0aChild psychology