00406nam a22001457a 4500003000400000008004100004082001700045100002400062245007600086260003200162300000900194502001800203650002700221650001200248OSt260527b        |||||||| |||| 00| 0 eng d  a627.52bL14E  aLal, Shashi Bhushan  aEffect of Practicle Size and Thickness of Aquifer on Cavity Development  aPusa, SamastipurbRAUc1990  a97P.  bB.Tech.d1990  aAgricultural Economics  aB.Tech.