TY  - JOUR
T1  - On Colour-Vision by Very Weak Light
JF  - Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934)
VL  - 76
IS  - 508
SP  - 199
EP  - 216
PY  - 1905/05/24/
UR  - http://dx.doi.org/10.1098/rspb.1905.0013
M3  - doi:10.1098/rspb.1905.0013
AU  - Burch, G.
ER  -