Downie, 1959
From dinoflaj2
Downie, C., 1959: Hystrichospheres from the Silurian Wenlock Shale of England. Palaeontology, v.2, no.1, p.56-71, pl.10-12. (Cover date October 1959.)
Downie, C., 1959: Hystrichospheres from the Silurian Wenlock Shale of England. Palaeontology, v.2, no.1, p.56-71, pl.10-12. (Cover date October 1959.)
