Szaniawski, Hubert; Wrona, Ryszard M. (1973). Polychaete jaw apparatus and scolecodonts from the Upper Devonian of Poland. <em>Acta Palaeontologica Polonica.</em> 18(3): 223-267, plates I-VI., available online athttps://www.app.pan.pl/article/item/app18-223.html[details] Available for editors [request]
original descriptionSzaniawski, Hubert; Wrona, Ryszard M. (1973). Polychaete jaw apparatus and scolecodonts from the Upper Devonian of Poland. <em>Acta Palaeontologica Polonica.</em> 18(3): 223-267, plates I-VI., available online athttps://www.app.pan.pl/article/item/app18-223.html[details] Available for editors [request]
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