00305nam a2200121Ia 4500003000400000008004100004020001300045040000800058100001700066245004900083260003800132300001300170LDD181029s9999    xx            000 0 und d  a74517856  cLDD  aMichael, A.M 0aWater well and pump engineeringcA.M Michael  aNew DelhibTata McGraw Hillc1989  axv, 929p