TY  - RPRT
TI  - George Wald memorial talk.
AU  - R Hubbard
AU  - E Wald
PY  - 1999
DO  - 10.1002/9780470515693.ch2
UR  - https://pubmed.ncbi.nlm.nih.gov/10614043/
ID  - 10614043
ER  -