00371nam a2200121Ia 4500008004100000020001800041100001800059245006500077250001400142260004700156300001800203650002800221240817s9999    xx            000 0 und d  a9790000000000  aPonnuswamy,S. 0aRailway transportation: engineering operation and management  a625 P75,r  c2012a New Delhib Narosa Publishing House  axix,24.7p. p.  a Railway transportation