TY  - JOUR
T1  - Colour Photometry. Part II. The Measurement of Reflected Colours. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 44
SP  - 237
EP  - 239
PY  - 1888/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1888.0028
M3  - doi:10.1098/rspl.1888.0028
AU  - de W. Abney, W.
AU  - Festing, M.
ER  -