000 00308nam a2200121Ia 4500
008 190829s9999 xx 000 0 und d
020 _a0 7100 7940 0
082 _a511.32
_bGRE/S
100 _aGREEN, J.A.
245 0 _aSETS & GROUPS
260 _bThe English Language Book Society
_aLondon
_c1977
942 _cBK
999 _c2292
_d2292