Natural background radiation in the United States  recommendations of the National Council on Radiation Protection and Measurements 

 - Washington  National Council on Radiation Protection And Measurements  1975 
 - xi, 163 s.  tbl., şkl., graf.  24 cm. 
 - NCRP report  no. 45 .
<br/><br/>İndeks var. Kaynakça var. 
<br/><br/><label>ISBN: </label>0-913392-27-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radiation--Dosage.<br/>Radiation, Background--United States.--Measurement
<br/><br/><label>Dewey Class. No.: </label>612.01448 NAT 1975