552,452 PROBLEMS Problems of drug dependence, 1981 : proceedings of the 44th Annual Scientific Meeting, The Committee on Problems of Drug Dependence, Inc. / ed. Louis S. Harris. - Rockville, Maryland : Department of Health and Human Services, Public Health Service, Alcohol, Drug Abuse, and Mental Health Administration ; National Institute on Drug Abuse Division of Research, 1983. - XIV, 552 s. : wykr. ; 23 cm (NIDA Research Monograph ; 43)