Symposium on Radiography 

 - Philadelphia :   American Society for Testing Materials,  1943  
<br/><br/><label>Standard No.: </label>DEX-M7033 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SIMPOSIO<br/>radigrafia
<br/><br/><label>Universal Decimal Class. No.: </label>543:442:061.3