TY  - RPRT
TI  - On B12 biosynthesis and evolution.
AU  - N H Georgopapadakou
AU  - A I Scott
PY  - 1977
DO  - 10.1016/0022-5193(77)90145-x
UR  - https://pubmed.ncbi.nlm.nih.gov/592883/
ID  - 592883
ER  -