Malik, Abdul; Sarfaraz, Syeda Farhana - In: Pakistan journal of commerce and social sciences 5 (2011) 1, pp. 155-165
During the course of this search man has extracted opium from poppy plant, cocaine from the leaves of coca bush, and cannabis from the hemp plant. Initially the use of these was only for the purpose of relieving the physical and mental capabilities, and for medicinal and surgical purpose. But...