TY  - JOUR
T1  - The Reduction Division in Ferns
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 73
SP  - 86
EP  - 92
PY  - 1904/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1904.0014
M3  - doi:10.1098/rspl.1904.0014
AU  - Gregory, R.
ER  -