Edit. Penguin Books, Ltd., 1981 England. 8ºM (20x13cm). 411 págs. Rústica ilustrada. Cubierta deslucida con roces. Signos de uso. «Traditionally, books on the planets have been written by astronomers, but this Pelican Original comes from a geologist at the Open University whose «down-to-earth» explanations of the geography, geology and meteorology of each of the planets transforms what were once obscure discs of ligth into real new worlds.»