Derechos de autor 1985 César Ángel Chamorro Álvarez, Paulino de Paz Cabello, José María Villar Lacilla, José Gabriel Fernández Álvarez
Except where otherwise noted, this item's license is described as Derechos de autor 1985 César Ángel Chamorro Álvarez, Paulino de Paz Cabello, José María Villar Lacilla, José Gabriel Fernández Álvarez