00273nam a2200109Ia 4500008004100000041000800041082001900049100001800068245006000086260000900146300000800155211209s1977    xx            000 0 und d  aeng  a621.75 N70 PRI  aPRITCHARD R T  aWORKSHOP PROCESS FOR MECHANICAL ENGINEERING TECHNIQUES   c1977  a430