By Asimov, Isaac.
Buenos Aires : Eudeba, 1971

By Battan, Louis J..
Buenos Aires : Eudeba, 1973

By Bondi, Herman.
Buenos Aires : Eudeba, 1970

By Landsberg, Helmut E..
Buenos Aires : Eudeba, 1972

By Ovenden, Michael.
Buenos Aires : Eudeba, 1971

By Battan, Louis J..
Buenos Aires : Eudeba, 1965

By Battan, Louis J..
Buenos Aires : Eudeba, 1965

By Edinger, James G..
Buenos Aires : Eudeba, 1969

By Frisch, Kael Von.
Buenos Aires : Eudeba, 1966

By Galambos, Robert.
Buenos Aires : Eudeba, 1964

By Pomerol, Charles.
Buenos Aires : Eudeba, 1969