TY  - JOUR
T1  - Notice of Further Researches among the Plants of the Coal-Measures
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 20
SP  - 435
EP  - 438
PY  - 1871/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1871.0082
M3  - doi:10.1098/rspl.1871.0082
AU  - Williamson, W.
ER  -