RAY Susanta K Intensification of agriculture ; A study in the plains of Uttar Pradesh - Delhi Hindustan pubkishing corp. 1985 - "xii,138p." cm. - Studies in economic development and planning;38 . Appendix :107-133p. Standard No.: 179234 Source: Reference Collections Dewey Class. No.: "X9(J):75.252, M5/SC"