We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCocaine and heroin dependence compared in poly-drug abusers.AuthorsHasin DS; Grant BF; Endicott J; Harford TCPublicationAmerican journal of public health, 1988, Vol 78, Issue 5, p567ISSN0090-0036Publication typearticleDOI10.2105/ajph.78.5.567