Specification of gammaray brachytherapy sources. 

 - Bethesda :  NCRP,  1974. 
 - v, 24 p. :  tabla 
 - Report, no.<41> .
 - Estados Unidos. National council on radiation protection and measurements .
 - Report, no.<41> .
<br/><br/> Recommendations of the NCRP  Apéndices y bibliografía: p.8-11 
<br/><br/><label>ISBN: </label>0913392235 
<br/><br/><label>ISSN: </label>0083209X 
<br/><br/><label>Standard No.: </label>NCRP-REPORT-41