Elements of the universe / by Glenn T. Seaborg and Evans G. Valens. Seaborg, Glenn Theodore, 1912- Valens, Evans G., joint author. Chemical elements. Chemistry Juvenile literature. QD466 .S4 523.1 SEE Includes bibliographical references and index. New York : Dutton, c1958. c1958. 1958 Text 253 p. : eng