Calhoun J F
Int J Addict. 1975;10(3):521-38. doi: 10.3109/10826087509026733.
An investigation into the patterns of drug use of drug users was conducted across six specific groups in a northeatern suburb and at a state university. Information was obtained concerning past and present frequency of use, location of use and procurement, and availability and source of procurement. Relative similarities and differences in patterns of drug use an understood through the resulting group and drug matrix is discussed.