TY  - GEN
AU  - Hartnoll, Richard
AU  - Hendriks, Vincent M.
AU  - Orrival, Marc
TI  - The assessment of drug problems [PDF]
PY  - 1998///
CY  - Copenhagen
PB  - WHO Regional Office for Europe
KW  - dataverzameling
KW  - drugs
KW  - epidemiologie
KW  - onderzoeksmethoden
KW  - registratie
UR  - http://www.google.com/search?q=the-assessment-of-drug-problems
ER  -