Lister, 1970
From dinoflaj2
Lister, T.R., 1970: The acritarchs and chitinozoa from the Wenlock and Ludlow Series of the Ludlow and Millichope areas, Shropshire. Palaeontographical Society Monographs, v.124, no.1 (publication 528), p.1-100, pl.1-13.
