000 00314nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a517.521 C774
100 _aCOLLINGWOOD.E.F
245 0 _aTHEORY OF CLUSTER SETS
260 _aCambridge
_bCambridge University Press
_c1966
300 _a21X14
942 _cBK
_2DDC
999 _c14074
_d14074