000 00254nam a2200097Ia 4500
008 220204s9999 xx 000 0 und d
082 _a547.7
_bADV.22
245 0 _aAdvances in heterocyclic chemistry.V 22
260 _aNew York
_bAcademic
_c1978
942 _cBK
999 _c34397
_d34397