Day, Richard H Singh, Inderjit <br/><br/>
Economic development as an adaptive process 

 - Cambridge  Cambridge university press  1977 
 - x, 321p.; 22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture - India Punjab (state) - mathematical models<br/>Economic development - mathematical models<br/>Model evaluation<br/>Punjab agriculture<br/>Yield response