Hair Assays for Drugs of Abuse in a Probation Population:  Pilot Study in a Florida Correctional Field Setting, 1993
The major objectives of this research project were: (1) to
 evaluate the effectiveness of the combination of hair and urine assays
 in determining drug use among probationers, (2) to examine the
 concordance patterns of hair and urine specimens, (3) to explore the
 perceptions and attitudes of probation officers …