TY  - RPRT
TI  - Unexplained elevated maternal serum alpha-fetoprotein level associated with third-trimester problems.
AU  - J D Stephens
PY  - 1989
DO  - 10.1016/0002-9378(89)90555-3
UR  - https://pubmed.ncbi.nlm.nih.gov/2475022/
ID  - 2475022
ER  -