Isotopic tracers and nuclear radiations : with applications to biology and medicine / by William E. Siri. With contributions by Ellsworth C. Dougherty [and others] Siri, William E. Tracers (Biology) Radiotherapy. Radioisotopes Radiotherapy QH505 .S5 539.74 SII Includes bibliographical references and index. New York : McGraw-Hill Book, 1949. 1949. 1949 Text xiii, 653 p. : eng