00285nam a2200121Ia 4500008004100000041000800041082000800049100001400057245002900071250001000100260004500110300000800155211209s1972    xx            000 0 und d  aeng  aRYD  aRYDER J D  aENGINEERING ELECTRONICS   a2 ed.  aNEW YORKbMCGRAW-HILL BOOK COMPANYc1972  a704