Morphologic variation and significance of acritarch excystment structures through the Ordovician Silurian and Devonian.
Reference:
Miller,M.A. (1982)
Morphologic variation and significance of acritarch excystment structures through the Ordovician Silurian and Devonian. American Association of Stratigraphic Palynologists,14th Annual Meeting,Program and Abstracts
Vol. 6 P. 286- 286