Papers on international cooperation in criminal justice administration consist of experts' papers, participants' papers, and reports from the three sessions of the seminar. Experts' papers address international cooperation in investigation, countermeasures against money laundering, cooperation on criminal law, international extradition, and firearms control in Federal law in the United States. Results are also presented from the fourth United Nations Survey of Crime Trends and the Operation of Criminal Justice Systems. Participants' papers describe the promotion of international cooperation in criminal justice administration in the countries of Bangladesh, Hong Kong, Pakistan, Singapore, and Thailand. The reports on the three seminar sessions focus on improvement in the exchange of information and investigative techniques in fighting international crime; current issues, practical problems, and their solutions and alternatives in international extradition; and selected issues and practical solutions on mutual legal assistance in criminal matters. Papers on the effective treatment of drug offenders and juvenile delinquents are also divided into experts' papers, participants' papers, and reports from the four groups that composed the training course. Experts' papers consider drug problems and countermeasures in Pakistan, the treatment of juvenile delinquents in Malaysia, the treatment of drug abusers in Thailand, the changing nature of criminal justice in England and Wales, American juvenile justice, and drug law enforcement in the United States. Participants' papers address juvenile justice, drug treatment, and juvenile delinquency in Hong Kong, Korea, and Papua New Guinea. Issues addressed by the four groups are the control of drug offenses, the treatment of drug offenders in institutional and non-institutional environments, and the effective treatment and prevention of juvenile delinquency. For individual papers, see NCJ-159653-77.