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Estimating the benefits of plant breeding research: methodological issues and practical challenges
Morris, M.L., (2003)
VARIETAL CHANGE IN POST-GREEN REVOLUTION AGRICULTURE: EMPIRICAL EVIDENCE FOR WHEAT IN PAKISTAN
Heisey, P.W., (1993)
Impacts of the training and visit extension system on farmers' knowledge and adoption of technology: Evidence from Pakistan
Hussain, S.S., (1994)