00360nam a2200157Ia 45000010006000000050017000060080041000230410008000640820015000721000021000872450036001082600009001443000033001536500008001866540008001941502220260306164957.0260306t2015||||xx |||||||||||||| ||spa|| aESP a523.1bS15 aSagan, CarleAUT 0aVida inteligente en el universo c2015 axvi, 559 páginas :c21 cm. aGEN aCHU