Haworth, A <br/><br/>
Studies and surveys of the use and abuse of drugs in Zambia 1966-1981 / 
A. Haworth. 
 - Paris :  UNESCO,  1983. 
 - 63 p. 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>37.178.8 (689.4) =20 HAW.