00318nam a2200109Ia 450000500170000000800410001708200220005810000220008024500550010226000430015730000080020020260205052735.0260111s9999||||xx |||||||||||||| ||und||  a621.381958  T572D  aTokheim , Roger L 0aDigital Electronics  : Principles and Applications  aNew DelhibTata McGraw Hill Pub.c1999  a406