A reappraisal of Salviniaceous fossils and its implication on the age and depositional environment of Nkporo Shale of Calabar Flank, Nigeria
Reference:
Kumaran,K.P.N. et al. (1994)
A reappraisal of Salviniaceous fossils and its implication on the age and depositional environment of Nkporo Shale of Calabar Flank, Nigeria The Palaeobotanist
Vol. 42 # 2 P. 210- 214