Zygnematoceous zygospores and other freshwater algal spores from the Uppermost Pliocene St. Erth Beds of Cornwall, Southwestern England.
Reference:
Head,M.J. (1990)
Zygnematoceous zygospores and other freshwater algal spores from the Uppermost Pliocene St. Erth Beds of Cornwall, Southwestern England. American Association of Stratigraphic Palynologists,23rd Annual Meeting,Program and Abstracts
# 23 P. 29- 29