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Understanding Children reflects on the development of children's minds - their abilities to understand language and to communicate; to explain events to the world; to read, write and draw; to deal with computers; to think perceive and to gain awareness. It is inspired by the work of Margaret Donaldson whose insights have changed our appreciation of the abilities of young children.

Methamphetamine is one of the most widely abused stimulants and together with amphetamine has led to serious social problems. Numerous papers in the fields of medicine, toxicology, pharmacology, sociology, etc. have appeared. In Japan for example about 20,000 to 22,000 persons have been arrested in recent years on suspicion of abuse, smuggling or illegal manufacture of drugs. In other countries, stimulant drugs also present social problems and efforts have been directed toward prevention. Although marked development of analytical techniques in the field of forensic sciences has been achieved,...