TY  - JOUR
T1  - The Numerical Registration of Colour. Preliminary Note
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 49
SP  - 227
EP  - 233
PY  - 1890/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1890.0088
M3  - doi:10.1098/rspl.1890.0088
AU  - Abney, W.
ER  -