00255nam a2200109Ia 4500008004100000041000800041082001800049100002000067245004100087260000900128300000800137211209s1977    xx            000 0 und d  aeng  a621.8 N77 SHR  aSHRIVASTAVA S B  aTEXT BOOK OF MECHANICAL ENGINEERING   c1977  a430