por Ridpath, Ian [autor] | Herrero de Ch., Julio [traductor] | Ridpath, Ian. Longman illustrated dictionary of astronomy & astronautics.
por Watt, Alec [autor] | Herrero de Ch., Julio [traductor] | Perez Valdelomar, Pilar [traductor] | Watt, Alec. Longman illustrated dictionary of geology.
por Godman, Arthur [autor] | Herrero de Ch., Julio [traductor] | Perez Valdelomar, Pilar [traductor] | Godman, Arthur. Longman illustrated science dictionary.