Aitken, P.B. <br/><br/>
Ruler for drawing radioactivity decay curves. 

 - Chalk River :  AECL,  1952. 
 - v. 10 (no. 6) p. 64 
<br/><br/><label>ISSN: </label>0067-0367 
<br/><br/><label>Standard No.: </label>AECL-12