O'Brien, Richard C. <br/><br/>
Dental radiography :  an introduction for dental hygienists and assistants / 
[by] Richard C. O'Brien. 
 - 2nd ed. 
 - Philadelphia :  Saunders,  1972. 
<br/><br/>Bibliography: p. 16. 
<br/><br/><label>ISBN: </label>0721668917 
<br/><br/><label>LCCN: </label>72173340 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teeth -- Radiography.--Teeth -- Radiography.
<br/><br/><label>LC Class. No.: </label>RK309  / .O2 1972 
<br/><br/><label>Dewey Class. No.: </label>617.6/07/572