000 00314nam a2200133Ia 4500
082 _a370.152
_bPOC
100 _aPowell, Len S.
_919590
245 _aCommunication and learning
_cLen S.Powell
260 _aLondon
_bPitman
_c1969
300 _axii, 217p.
546 _aeng
650 _aLearning
_919591
942 _cBK
999 _c24311
_d24311