Models of energy flow for rural planning in the Ebro river watershe - Lugo A.E.; Patino Ruiz M.; Mayoral Gomez O.; Pizzaro Camacho D.; Gomez Cebrian J.; Juarez Cardona F.; Brun Rodrigo J.; Maluquer Amoros A.; Lain Alonso M.P.; Khalil Abd-Allah I.; Caluo J. (Energy flow in the Ebro basin, 1983)