by United States. Office of National Drug Control Policy
United States. Congress. House. Select Committee on Narcotics Abuse and Control.
United States. General Accounting Office
United States. Congress. Senate. Committee on Labor and Human Resources.
United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Health and the Environment.
United States. Congress. Senate. Committee on Labor and Human Resources.
Canada. Parliament. House of Commons. Standing Committee on National Health and Welfare.
