TY  - RPRT
TI  - Reference values for singleton and twin placental weights.
AU  - H Pinar
AU  - C J Sung
AU  - C E Oyer
AU  - D B Singer
DO  - 10.1080/15513819609168713
UR  - https://pubmed.ncbi.nlm.nih.gov/9025888/
ID  - 9025888
ER  -