The effects of climatic variations on agriculture in the central Sierra of Ecuador.
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R. E. Bravo, & L. Cañadas Cruz, & W. Estrada, & Joseph Hodges, & G. Knapp, & Andrés C. Ravelo, & A. M. Planchuelo-Ravelo, & O. Rovere, & T. S. Solis, & M. L. Parry, & T. R. Carter, & Nicolaas T. Konijn (1988). The effects of climatic variations on agriculture in the central Sierra of Ecuador..