000 00304nam a2200121Ia 4500
008 190216s9999||||xx |||||||||||||| ||und||
100 _aRueff M And Jeger Max
245 0 _aSets And Boolean Algebra
260 _bGeorge Allel And Unwin Ltd
_c1970
300 _a191p
650 _aMathematics
942 _cBK
999 _c30850
_d30850