000 00404nam a2200121Ia 4500
008 160316s9999 xxu||||| |||| 00| 0 eng d
100 _aBalfour, A
245 _aAn introduction to sets, groups and matrices
260 _aLondon
_bHeinmann educational
_c1970
300 _aVII, 86p
650 _aGroup theory
999 _c5648
_d5648