00494nam a2200109Ia 4500008004100000082003100041100001900072245009500091260007100186300000600257500012100263260825b        |||||||| |||| 00| 0 eng d  a338.163170954552bAs853.EA  aAsthana, S. S.  aEconomic analysis of conservation irrigation in well commanded area of Ludhiana disticsb/  aLudhiana:bDepartment of Agricultural Economics & Sociology,c1966  a   a"A thesis submitted to the Punjab Agricultural University for the degree of Master of Science (Agriculture & A. H.)"