The medical and biologic sciences are among the chief beneficiaries of the recent practical developments in nuclear physics. A large number of isotopes are now available for qualified research workers and for the treatment of certain diseases. Inevitably, the first scientists to work with stable isotopes and with radioisotopes have been those associated with the development of atomic energy during the war years and those with a comprehensive knowledge of physics. The literature of the medical and biologic applications of nuclear energy is extensive and is widely dispersed in physical journals, technical reports and society proceedings. This is especially true of literature relating to fundamental phenomena and instrumentation. As a conseqence of this, the medical or biologic scientist who wishes to perform a certain type of experiment is faced with a difficult task in locating source material and, particularly, in separating the material he seeks from theoretic formulations.