TY  - RPRT
TI  - Positional information in chick limb morphogenesis.
AU  - D Summerbell
AU  - J H Lewis
AU  - L Wolpert
PY  - 1973
DO  - 10.1038/244492a0
UR  - https://pubmed.ncbi.nlm.nih.gov/4621272/
ID  - 4621272
ER  -