TY  - RPRT
TI  - Twin growth problems: causes and sonographic analysis.
AU  - S D Harrison
AU  - D R Cyr
AU  - R M Patten
AU  - L A Mack
PY  - 1993
DO  - 10.1016/s0887-2171(05)80069-1
UR  - https://pubmed.ncbi.nlm.nih.gov/8481267/
ID  - 8481267
ER  -