Volume of x-ray visits, United States, April-September 1970 ... 

 - Rockville, MD,  1973. 
 - DHEW publication ;  no. (HSM) 73-1507 .
 - Data from the National Health Survey. series 10 ;  no. 81 .
 - Vital and health statistics. Series 10, Data from the National Health Survey ;  Vital and health statistics. Series 10, Data from the National Health Survey ;  Vital and health statistics. Series 10, Data from the National Health Survey ;  no. 81 .
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>X-rays -- Statistics.--X-rays -- Statistics.<br/>Radiography -- Statistics.--Radiography -- Statistics.