References
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- Foong K., Navaratnam V. “Assessment of Drug Dependence in Malaysia–an Update Analysis”. Monograph Series No. 6. Drug Research Centre. Universiti Sains Malaysia, Pulau Pinang 19872. Foong K., Navaratnam V. “Assessment of Drug Dependence in Malaysia–an Update Analysis”. Monograph Series No. 6. Drug Research Centre. Universiti Sains Malaysia, Pulau Pinang 1987
- Navaratnam V., Foong K. “Natural History of Heroin Addiction and Adjunctive Drug Use”. Research Report Series No. 16. Centre for Drug Research. Universiti Sains Malaysia, Pulau Pinang 19883. Navaratnam V., Foong K. “Natural History of Heroin Addiction and Adjunctive Drug Use”. Research Report Series No. 16. Centre for Drug Research. Universiti Sains Malaysia, Pulau Pinang 1988