[1]
I. U. Mohammadzai, M. Irfan, N. Khan, M. Khan, and S. Usman, “Physical Characteristics, Inorganic Constituents and Trace Metals Determination in the Street-Vended Samples of Heroin”, Pakistan Journal of Scientific & Industrial Research, vol. 49, no. 4, pp. 251–255, Aug. 2006.