TY  - BOOK
AU  - Dukes,M.N.G.
ED  - World Health Organization.
TI  - Drug Utilization Studies: methods and uses 
SN  - 92-890-1308-7
PY  - 1993///
CY  - Copenhagen
PB  - World Health Organization
KW  - Drug utilization
N1  - Includes bibliographical references
ER  -