Radiation protection standards for radioluminous time pieces :  recommendattions drawn up 
by a joint group of experts of the European Nuclear Energy Agencyand the International Atomic Energy Agency. 
 - Vienna :  International Atomic Energy Agency,  1967. 
 - 37 p. ;  22 cm. 
 - Safety Series, no.23 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radiation--Safety measures.