Hughes, P.H.; Venulet, J. <br/><br/>
Core data from epidemiological studies of non medical drug use. 

 - Geneva :  WHO,  1980. 
 - WHO offset publication no. 56 .
<br/><br/> This report revies the approach used in carrying out a study in which forms for collecting essential data (on the basis of core data items) were developed and later tested on saupks of 300 drug users in each of six collaborating centres. This report also discusses the rationale behind the selection of certain core data items. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Health.<br/>Drugs -- Drug addiction -- Public health.--Drugs -- Drug addiction -- Public health.--Drugs -- Drug addiction -- Public health.