TY  - BOOK
AU  - Smith , P. J.   .
TI  - Methods for Field Trials of Interventions Against Troplcal Diseases A Toolbox / 
U1  - 614.4 
PY  - 1991///
CY  - New York : 
PB  - Oxford Uni Press , 
KW  - Epidemiology
KW  - Preventive and Social Medicine
KW  - Medical Science
ER  -