TY  - JOUR
T1  - On the Organisation of the Fossil Plants of the Coal-Measures. Part XVIII. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 49
SP  - 154
EP  - 155
PY  - 1890/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1890.0080
M3  - doi:10.1098/rspl.1890.0080
AU  - Williamson, W.
ER  -