TY - JOUR T1 - On the Spectra of the Alkaline Earth Fluorides and their Relation to Each Other JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 99 IS - 700 SP - 436 EP - 455 PY - 1921/08/02/ UR - http://dx.doi.org/10.1098/rspa.1921.0057 M3 - doi:10.1098/rspa.1921.0057 AU - Datta, S. ER -