Fragilariopsis Hustedt as a section of the genus Nitzschia Hassall
Hasle, G.R. (1972). Fragilariopsis Hustedt as a section of the genus Nitzschia Hassall, in: Simonsen, R. (Ed.) First Symposium on Recent and Fossil Marine Diatoms, Bremerhaven, September 21-26, 1970. Proceedings. Nova Hedwigia. Beiheft, 39: pp. 111-119
In: Simonsen, R. (Ed.) (1972). First Symposium on Recent and Fossil Marine Diatoms, Bremerhaven, September 21-26, 1970. Proceedings. Nova Hedwigia. Beiheft, 39. J. Cramer: Lehre. ISBN 3-768254-39-9. 294 pp.
In: Nova Hedwigia. Beiheft. J. Cramer in Gebr. Borntraeger Verlagsbuchhandlung: Stuttgart. ISSN 0078-2238; e-ISSN 1438-9134
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