TY  - GEN
AU  - Williams,O D
TI  - Methodological issues in international comparisons
SN  - 0300-5771
PY  - 1989///1221
KW  - Coronary Disease
KW  - epidemiology
KW  - Humans
KW  - Population Surveillance
N1  - Publication Type: Comparative Study; Journal Article
ER  -