TY  - JOUR
T1  - Researches on Emeralds and Beryls.--Part I. On the Colouring-Matter of the Emerald
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 21
SP  - 409
EP  - 421
PY  - 1872/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1872.0084
M3  - doi:10.1098/rspl.1872.0084
AU  - Williams, G.
ER  -