TY  - GEN
TI  - Field trials of health interventions in developing countries: : a toolbox 
SN  - 0333640586
U1  - 616.9883 
PY  - 1996///
CY  - London : 
PB  - Macmillan Education
KW  - Tropical medicine
KW  - Medicine research
N1  - Includes index
ER  -