Estimating prevalence : indirect methods for estimating the size of the drug problem / United Nations Office on Drugs and Crime.
New York, 2003.
88 p. ; 30 cm.
Drug abuse
Drug traffic
Narcotics
Control of.
HEA
Drug traffic
Narcotics
Control of.
HEA
R 16.54 UNO -12226
12226
Note: Global Assessment Programme on Drug Abuse (GAP) toolkit module 2