00321nam a2200133Ia 4500008004100000041000800041082002200049100002200071245002500093260002300118300000800141365001600149700002200165230718s9999    xx            000 0 und d  aeng  a621.3815'324bVAL  aValkenburg V.M.E.  aAnalog Filter Design  c1982bSaunders/HBJ  a606  cRs.b595.00  aValkenburg M.E.V.