000			00365nam a2200145 4500
003			OSt
008			220602b |||||||| |||| 00| 0 eng d
082			_a510 _bPEF
100			_aPfeiffer, Paul E.
245			_aSets,events,and switching
260			_aLondon: _bMcgraw-hill book company, _c1964.
300			_a131p. _c21cm
650		0	_aMathematics
942			_2ddc _cLM
999			_c104367 _d104367