Some aspects of late Cambrian and early Ordovician acritarchs
Martin, F. (1982). Some aspects of late Cambrian and early Ordovician acritarchs, in: Bassett, M.G. et al. (Ed.) The Cambrian-Ordovician boundary: Sections, fossil distributions, and correlations. Geological Series, 3: pp. 29-40, plate I
In: Bassett, M.G.; Dean, W.T. (Ed.) (1982). The Cambrian-Ordovician boundary: Sections, fossil distributions, and correlations. Geological Series, 3. National Museum of Wales: Cardiff. ISBN 0-7200-0253-2. 227 pp.
In: Geological Series. National Museum of Wales: Cardiff. ISSN 0962-0575
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