Farmers' estimations as a source of production data : methodological guidelines for cereals in Africa - Murphy, Josette; Casley, D. J.; Curry, John J., 1947-; World Bank (Washington, D.C. : The World Bank, 1991)
Includes bibliographical references (p. [69]-71)
Keywords: Agricultural estimating and reporting -- Africa; Agricultural surveys -- Africa -- Methodology; Grain -- Yields -- Africa