TY - JOUR T1 - On Radiant Matter Spectroscopy: Note on the Spectra of Erbia JF - Proceedings of the Royal Society of London (1854-1905) VL - 40 SP - 77 EP - 79 PY - 1886/01/01/ UR - http://dx.doi.org/10.1098/rspl.1886.0011 M3 - doi:10.1098/rspl.1886.0011 AU - Crookes, W. ER -