TY  - JOUR
T1  - On the Organization of the Fossil Plants of the Coal-Measures. Part VI. Ferns
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 164
SP  - 675
EP  - 703
PY  - 1874/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1874.0019
M3  - doi:10.1098/rstl.1874.0019
AU  - Williamson, W.
ER  -