Cellular Events Produced by Ionizing Radiations 203 



9. U.S. National Committee on Radiation Protection and Measurements, 

 "Permissible Dose From External Sources of Ionizing Radiations," National 

 Bureau of Standards Handbook 59 (Washington, D.C.: Government Printing 

 Office, 1954). 



a. Addendum to Handbook 59 (1958). 



Several articles on fall-out and its effect on man can be found in Science. 



