RT Journal Article
SR Electronic
T1 Observation and Inference. An Introduction to the Methods of Epidemiology
JF Journal of Epidemiology and Community Health
JO J Epidemiol Community Health
FD BMJ Publishing Group Ltd
SP 174
OP 174
DO 10.1136/jech.46.2.174-a
VO 46
IS 2
A1 Jones, David R
YR 1992
UL http://jech.bmj.com/content/46/2/174.2.abstract
AB