PETERSEN, E E <br/><br/>
Effects of diaphragms on the intensity of radiation in air.  [electronic resource] 

 -  Journal of dental research  Apr 1957 
 - 291-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0022-0345 
<br/><br/><label>Standard No.: </label>10.1177/00220345570360022101  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diaphragm<br/>Humans<br/>Radiography