TY  - GEN
ED  - Symposium on Epidemiologic Studies and Clinical Trials in Chronic Diseases 1972 : Washington,D.C.
TI  - Epidemilogic studies and clinical trials in chronic disease : procedings
T2  - (PAHO scientific publication, no. 257)
PY  - 1973///
CY  - Washington : 
PB  - Pan American Health Organization
KW  - Chronic disease
KW  - Congresses
KW  - Epidemiology
KW  - Clinical trials
ER  -