000 00312nam a22001217a 4500
082 _a301.1
100 _aHALL, d M
245 _aThe dynamics of group discussion :
_ba hsndbook for discussion leaders /
_cD, M Hall
260 _bThe interstate
_cc1961
300 _a89p.;
500 _aincludes index
942 _cBK01
999 _c4417
_d4417