000 00280nam a2200109 4500
245 _aBoolean systems
_cby Douglas Kaye
100 _aKaye, Doouglas
260 _aLondon
_bLongman Green
_c1968
300 _av, 191p. ; 21cm.-
490 _aMathematical topics
082 _a511.32
_b KAY
999 _c24935
_d24935