The National Institute on Drug Abuse has obtained permission from the Journal of Studies on Alcohol, Inc. to quote previously published material which appears on page 224. Further reproduction of this passage is prohibited without specific permission of the copyright holder. With this exception, the contents of this monograph are in the public domain and may be used and reprinted without special permission. Citation as to source is appreciated. Library of Congress catalog card number 79-600067 DHEW publication number (ADM) 79-801 Printed 1979 NIDA Research Monographs are indexed in the Index Medicus. They are selectively included in the
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