PT  - JOURNAL ARTICLE
AU  - Womersley, J
TI  - Letters to the Editor
AID  - 10.1136/jech.42.1.99-a
DP  - 1988 Mar 01
TA  - Journal of Epidemiology and Community Health
PG  - 99--100
VI  - 42
IP  - 1
4099  - http://jech.bmj.com/content/42/1/99.2.short
4100  - http://jech.bmj.com/content/42/1/99.2.full
SO  - J Epidemiol Community Health1988 Mar 01; 42