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Agricultural Production Productivity and R&D over the Past Half Century An Emerging New World Order
Agricultural Production Productivity and R&D over the Past Half Century An Emerging New World Order

Versão 1.2
Philip G. Pardey, Julian M. Alston, and Connie Chan Kang* August 21, 2012 Fonte: http://ageconsearch.umn.edu/bitstream/131824/2/PardeyEtAlFinal.pdf
