1.
Díaz de Sumaza ZM, Rodríguez de Zapata L. Estimation on the Income Elasticity of Household Demand for Sweet Potatoes, Ipomoea batatas and Yams, Dioscorea Spp. JAUPR [Internet]. 1972 Oct. 1 [cited 2024 Dec. 22];56(4):432-8. Available from: https://revistas.upr.edu/index.php/jaupr/article/view/10806