Aspects of Permian palaeobotany and palynology IX. Conifer-dominated Rotliegend floras from the Saar-Nahe Basin, (?Late Carboniferous - Early Permian soutwest Germany) with special reference to the Reproductive biology of Early Conifers.
Reference:
Kerp,J.H.F. et al. (1990)
Aspects of Permian palaeobotany and palynology IX. Conifer-dominated Rotliegend floras from the Saar-Nahe Basin, (?Late Carboniferous - Early Permian soutwest Germany) with special reference to the Reproductive biology of Early Conifers. Review of Palaeobotany and Palynology
Vol. 62 # 3 P. 205- 248