TY  - JOUR
T1  - On the Organisation of the Fossil Plants of the Coal-Measures. Part XIX. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 50
SP  - 469
EP  - 472
PY  - 1891/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1891.0061
M3  - doi:10.1098/rspl.1891.0061
AU  - Williamson, W.
ER  -