Singh, Inderjit. <br/><br/>
Factor utilization and substitution in economic development :  a green revolution case study / 
by Inderjit Singh and Richard H. Day. 
 - Columbus, OH :  Prepared for Agency for International Development, by Ohio State University,  1973. 
 - Singh, Inderjit. Studies in agricultural capital and technology, economics and sociology. Occasional paper ;  no. 138 .
 - Singh, Inderjit. Studies in agricultural capital and technology, economics and sociology. Occasional paper ;  Singh, Inderjit. Studies in agricultural capital and technology, economics and sociology. Occasional paper ;  Singh, Inderjit. Studies in agricultural capital and technology, economics and sociology. Occasional paper ;  no. 138 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture -- Economic aspects.--Agriculture -- Economic aspects.