00254nam a2200109Ia 4500008004100000041000800041082001800049100001900067245004100086260000900127300000800136211209s1977    xx            000 0 und d  aeng  a621.8 N77 SHR  aSHRIVASTAV S B  aTEXT BOOK OF MECHANICAL ENGINEERING   c1977  a430