Purroy Vásquez, R.; Ortega Vargas, E.; Hernández Santiago, Q.; Del Ángel Piña, Óscar; Meza Hernández, J.; Reyes Santiago, B.; Nicolás Vicente, F. Maize Small-Scale Agroecosystems in the High Huasteca Region of Veracruz: Economic-Energetic Efficiency and Poverty. ASYD 2019, 16, 105-121.