000 00273nam a2200121Ia 4500
008 221001s1970 xx 000 0 eng d
082 _a512.89 RUE
100 _aRueff, M.
245 0 _aSets and boolean algebra
260 _aLondon
_c1970
300 _a192p.
942 _2ddc
_cBK
999 _c314
_d314