00266nam a2200097Ia 4500008004100000082002000041100002000061245004300081260003300124300001100157240817s9999    xx            000 0 und d  a621.3815 K77 s.  aRoginskii ,V.N. 0aSynthesis of relay switching circuits.  c1959a Londonb Vam Nostrand  a184 p.