TY  - RPRT
TI  - Gestational interval from vital records.
AU  - L M Hammes
AU  - A E Treloar
PY  - 1970
DO  - 10.2105/ajph.60.8.1496
UR  - https://pubmed.ncbi.nlm.nih.gov/5465461/
ID  - 5465461
ER  -