Johnston, Lloyd D. <br/><br/>
Review of general  population surveys of drug abuse. 

 - 57 p. 
 - WHO offset publications, no.52 .
<br/><br/><label>ISBN: </label>9241700521 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Substance abuse<br/>Epidemiologic methods<br/>Healthsurveys