Radioactivity and its measurement / by Wilfrid B. Mann and S.B. Garfinkel. Mann, W. B. (Wilfrid Basil), 1908-2001. Garfinkel, S. B., joint author. Commission on College Physics. Radioactivity. QC795 .M242 539.752 MAR Includes bibliographical references and index. Princeton, N.J., Van Nostrand, 1966. 1966. 1966 Text 168 p. : eng Van Nostrand momentum book no. 10