A study of the effectiveness of prevention and Rehabilitation programs conducted in relation to addiction of dangerous drugs 
Wijewantha,M.A.K.P. 
 -  2008. 
 - ix,65p.: 
<br/><br/> Medagama, S., & Jayasekara, K.M.S.D. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/096