Boucot, A. J. (1957). Revision of some Silurian and Early Devonian spiriferid genera and erection of Kozlowskiellinae, new subfamily. Senckenbergiana Lethaea. 38: 311-334.
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Boucot, A. J.
1957
Revision of some Silurian and Early Devonian spiriferid genera and erection of Kozlowskiellinae, new subfamily