TY  - RPRT
TI  - Study design in perinatal medicine.
AU  - K L Noller
AU  - L J Melton
PY  - 1985
DO  - 10.1055/s-2007-999962
UR  - https://pubmed.ncbi.nlm.nih.gov/3874631/
ID  - 3874631
ER  -