Cosmic radiation : Colston papers / based on a symposium promoted by the Colston Research Society and the University of Bristol in September 1948. Colston Research Society. Cosmic rays. 539.7223 COC Pub. as a special supp. to Research. Includes bibliographical references. London : Butterworth, 1949. 1949. 1949 Text viii, 189 p. : eng Colston papers ; vol.1 Colston papers ; v. 1