338.1309543
T623K
           Tiwari, Shushil
               Krishi upaj ki vipanan (Sagar jile ke sandarbh mein) \ Shushil Tiwari - New Delhi : Northern Book, 1992.
               xxiv, 255p.
                ISBN: 81-7211-023-5

131221
                Subjects: Agriculture-Economic aspects-Mathematical Models; National Income; Economics.