00358pam a2200145a 44500008003800000020001500038041000900053082002300062100006000085245000900145250000500154260003700159300000600196650001000202230515b0    xxu||||| |||| 00| 0 eng d  a1992-02-14  aNULL  a"""621.38153 / PET  aINTRODUCTION TO SWITCHING THEORY AND LOGICAL DESIGN(HP)  aNULL  a  aNULLbPETERSON G.R. &HILL F.Kc0  a0  a300.3