TY  - JOUR
T1  - On the Organization of the Fossil Plants of the Coal-Measures. Part IV. Dictyoxylon, Lyginodendron, and Heterangium
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 163
SP  - 377
EP  - 408
PY  - 1873/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1873.0011
M3  - doi:10.1098/rstl.1873.0011
AU  - Williamson, W.
ER  -