TY  - JOUR
T1  - On the Relative Behaviour of the H and K Lines of the Spectrum of Calcium
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 61
SP  - 433
EP  - 441
PY  - 1897/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1897.0056
M3  - doi:10.1098/rspl.1897.0056
AU  - Huggins, W.
AU  - Huggins, M.
ER  -