TY  - RPRT
TI  - What is an embryo?
AU  - Howard W Jones
AU  - Lucinda Veeck
PY  - 2002
DO  - 10.1016/s0015-0282(01)03268-x
UR  - https://pubmed.ncbi.nlm.nih.gov/11937110/
ID  - 11937110
ER  -