00325nam a2200121Ia 4500008004100000082002200041100001900063245004100082260004100123300000900164630001800173650001200191211109s9999||||xx |||||||||||||| ||und||  a621.381 32bDOU-L  aDouglas, Lewin 0aLogical Design of Switching Circuits  bThomas Nelson and SonsaLondonc1974  a404p  xgeneral Stack  vPhysics