Marginal Resource Productivity for Agriculture in Selected Areas of South Africa and the United States
Earl O. Heady and
Schalk du Toit
Journal of Political Economy, 1954, vol. 62, issue 6, 494
Date: 1954
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Persistent link: https://EconPapers.repec.org/RePEc:ucp:jpolec:v:62:y:1954:p:494
DOI: 10.1086/257606
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