We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePatterns and predictors of cocaine and crack use by clients in standard and enhanced methadone maintenance treatment.AuthorsGrella CE; Anglin MD; Wugalter SEPublicationThe American journal of drug and alcohol abuse, 1997, Vol 23, Issue 1, p15ISSN0095-2990Publication typearticleDOI10.3109/00952999709001685