Mohammadzai IU, Irfan M, Khan N, Khan M, Usman S. Physical Characteristics, Inorganic Constituents and Trace Metals Determination in the Street-Vended Samples of Heroin. Pakistan Journal of Scientific & Industrial Research [Internet]. 2006 Aug. 28 [cited 2025 Jun. 8];49(4):251-5. Available from: http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/1185