TY  - JOUR
T1  - Further Observations on the Spectra of Some of the Nebulae, with a Mode of Determining the Brightness of These Bodies. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 15
SP  - 17
EP  - 19
PY  - 1866/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1866.0010
M3  - doi:10.1098/rspl.1866.0010
AU  - Huggins, W.
ER  -