PT  - JOURNAL ARTICLE
AU  - R. G. Record
AU  - Ian Leck
TI  - Sources of Seasonal Variation in Recorded Length of Gestation
AID  - 10.1136/jech.17.3.128
DP  - 1963 Jul 01
TA  - British Journal of Preventive & Social Medicine
PG  - 128--132
VI  - 17
IP  - 3
4099  - http://jech.bmj.com/content/17/3/128.short
4100  - http://jech.bmj.com/content/17/3/128.full
SO  - Br J Prev Soc Med1963 Jul 01; 17