TY  - JOUR
T1  - On Europium and Its Ultra-Violet Spectrum
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 74
SP  - 550
EP  - 551
PY  - 1904/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1904.0154
M3  - doi:10.1098/rspl.1904.0154
AU  - Crookes, W.
ER  -