Mohammadzai, Imdad Ullah, Muhammad Irfan, Nadir Khan, Mumtaz Khan, and Saadya Usman. “Physical Characteristics, Inorganic Constituents and Trace Metals Determination in the Street-Vended Samples of Heroin”. Biological Sciences - PJSIR 49, no. 4 (August 28, 2006): 251–255. Accessed June 7, 2025. http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/1185.