TY  - JOUR
T1  - Further Observations on the Organisation of the Fossil Plants of the Coal-Measures. Part I. Calamites, Calamostachys, and Sphenophyllum. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 55
SP  - 117
EP  - 124
PY  - 1894/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1894.0021
M3  - doi:10.1098/rspl.1894.0021
AU  - Williamson, W.
AU  - Scott, D.
ER  -
