Oral health surveys :  Basic methods / 
World Health Organization. 
 - 4th ed. 
 - Geneva :  World Health Organization,  1997. 
 - vii, 66 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>ISBN: </label>92-4-154493-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dental surveys<br/>Teeth--Diseases