00421nam a2200157Ia 4500008004100000082001800041100001300059245003600072250000600108260003400114300000700148650003800155650003400193653002600227653001000253170901s1986    xx            000 0 und d  a621.252bS11E  aSahay, J 0aElements of Pumps and Tubewells  a1  aPatnabAgro Book Agencyc1986  a80  aEngineering and allied operations  aTechnology (Applied sciences)  aHydraulic engineering  aPumps