TY  - RPRT
TI  - Chimaeras and cell lineage in development.
AU  - J H Lewis
AU  - D Summerbell
AU  - L Wolpert
PY  - 1972
DO  - 10.1038/239276a0
UR  - https://pubmed.ncbi.nlm.nih.gov/4562031/
ID  - 4562031
ER  -