TY - JOUR T1 - On the Spectrum of Thallium, and Its Relation to the Homologous Spectra of Indium and Gallium JF - Proceedings of the Royal Society of London (1854-1905) VL - 53 SP - 369 EP - 372 PY - 1893/01/01/ UR - http://dx.doi.org/10.1098/rspl.1893.0024 M3 - doi:10.1098/rspl.1893.0024 AU - Wilde, H. ER -