Naylorplanet.uwc.ac.za/nisl/gwen's files/geocourse/Course...0 Real Prices, 1960-2003 (1996 $)...
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Naylorplanet.uwc.ac.za/nisl/gwen's files/geocourse/Course...0 Real Prices, 1960-2003 (1996 $) com o The Green Revolution 40 60 Traditional Variety 80 too 120 140 160 days IR36 IR10179-2-3