TY  - RPRT
TI  - A simple method of internal tocography.
AU  - E A WILLIAMS
AU  - J A STALLWORTHY
PY  - 1952
DO  - 10.1016/s0140-6736(52)91847-3
UR  - https://pubmed.ncbi.nlm.nih.gov/14889861/
ID  - 14889861
ER  -