000 00312nam a22000857a 4500
082 _a371.2
_bHEN.D
245 _aDynamics of instructional groups :
_bsociopsychological aspects of teaching and learning
_cEdited by Nelson B Henry
260 _aChicago:
_bNational Society for the Study of Education
_c1960
942 _cBK
999 _c325326
_d325326