TY  - JOUR
T1  - On the Organization of the Fossil Plants of the Coal-Measures. Part VIII. Ferns (Continued) and Gymnospermous Stems and Seeds
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 167
SP  - 213
EP  - 270
PY  - 1877/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1877.0007
M3  - doi:10.1098/rstl.1877.0007
AU  - Williamson, W.
ER  -