The Textures of Heroin: User Perspectives on "Black Tar" and Powder Heroin in Two U.S. Cities
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Since the 1990s, U.S. heroin consumers have been divided from the full range of available products: east of the Mississippi River, Colombian-sourced powder heroin (PH) dominates the market while, to the west, Mexican-sourced "black tar" (BTH) is the main heroi... ...
