Bryozoa. The Fauna of the Bay of Kolsk and the conditions of its existence., Derjugin, K. M. The Fauna of the Bay of Kolsk and the conditions of its existence. Publ. Imp. Acad. Sci. 1915 34: 376-393. [In Russian.]", 1956: 376-393. Chapter pagination: 376-393. [Zoological Record Volume 93]