TY  - JOUR
T1  - On Intensity Relations in the Spectrum of Helium
JF  - Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Math. or Phys. Character (1896-1934)
VL  - 220
SP  - 137
EP  - 173
PY  - 1920/01/01/
UR  - http://dx.doi.org/10.1098/rsta.1920.0005
M3  - doi:10.1098/rsta.1920.0005
AU  - Merton, T.
AU  - Nicholson, J.
ER  -