00280nam a2200121Ia 4500082002100000100001800021245004800039250001200087260004300099300000600142500000500148700000500153  a624.0202bK45.IP  aKhanna, P. N.  aIndian practical civil engineers handbookb  aNew 5th  aNew DelhibEngineers Publicationc1974  a   a  a