Langa, Harry. <br/><br/>
Relative analgesia in dental practice : 

 - 2d ed. 
 - Philadelphia :  Saunders,  1976. 
 - xv, 419 p.   ill.  
<br/><br/><label>ISBN: </label>0721656218 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrous oxide.<br/>Anesthesia in dentistry.<br/>Analgesia.<br/>Anesthesia, Dental.<br/>Nitrous oxide
<br/><br/><label>LC Class. No.: </label>MED RK512.N55  / L36