TY  - RPRT
TI  - Biochemical differences between amniotic fluid and maternal urine.
AU  - G Mitchell
AU  - B Field
AU  - C Kerr
PY  - 1977
DO  - 10.1136/bmj.1.6064.811-a
UR  - https://pubmed.ncbi.nlm.nih.gov/66963/
ID  - 66963
ER  -