TY  - BOOK
AU  - Barker,D.J.P.
AU  - Hall,A.J.
TI  - Practical epidemiology
SN  - 0443037876
AV  - RA652 .B37 1991
PY  - 1991///
CY  - Edinburgh, New York
PB  - Churchill Livingstone
KW  - Epidemiology
KW  - Technique
N1  - Includes index; Includes bibliographical references
ER  -