Field evaluation of the Los Angeles Police Department drug detection program. Technical report.

Mode of access: Internet.

Principles and techniques of drug recognition expert training. The DRE Instructor Training School teacher-trainer manual.

National Highway Traffic Safety Administration, Washington, D.C.

Principles and techniques of drug recognition expert training. The DRE Instructor Training School student-instructor manual.

National Highway Traffic Safety Administration, Washington, D.C.

Preliminary training for drug evaluation and classification. The PRE-School student manual.

National Highway Traffic Safety Administration, Washington, D.C.