00411nam a22001577a 4500003000400000008004100004082001800045100001600063245004700079260003200126300001000158502001800168650002900186650002600215650001200241OSt260611b        |||||||| |||| 00| 0 eng d  a628.114b046F  aPrakash, OM  aField Studies on Stability of Cavity Wells  aPusa, SamastipurbRAUc1992  a154P.  bM.Tech.d1992  aAgricultural Engineering  aIrrigation & Drainage  aM.Tech.