The biostratigraphic potential of Middle Cambrian to Tremadocian acritarchs; Modification of existing zonal schemes based on material from Conception and Trinity Bays, Newfoundland, and St.John, New Brunswick.
Reference:
Parsons,M.G. et al. (1991)
The biostratigraphic potential of Middle Cambrian to Tremadocian acritarchs; Modification of existing zonal schemes based on material from Conception and Trinity Bays, Newfoundland, and St.John, New Brunswick. Palynology
Vol. 15 P. 250- 250