Occupational radiation protection :  safety guide / 
Jointly sponsored by the International Atomic Energy Agency and the International Labour Office 
 - Vienna :  International Atomic Energy Agency  1999 
 - 73 p. :  ill. ;  24 cm. 
 - Safety standards series;  No. RS-G-1.1 .
<br/><br/>Refrences: p. 68-69 
<br/><br/><label>ISBN: </label>9201022999