TY  - JOUR
T1  - On Changes in the Absorption Spectra of "Didymium" Salts
JF  - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934)
VL  - 87
IS  - 593
SP  - 121
EP  - 137
PY  - 1912/08/13/
UR  - http://dx.doi.org/10.1098/rspa.1912.0064
M3  - doi:10.1098/rspa.1912.0064
AU  - Ball, W.
ER  -