Breivel, I. A. (1959). Spiriferidae and Atrypidae, pp. 52-73. In: A. N. Khodalevich et al. (eds.). Brachiopods and Corals from the Eifelian Bauxite Beds of the Eastern Slopes of the Central and Northern Urals. Ministerstvo Geologii i Okhrani Nedr SSR, Uralsk Geologicheskoe Upravlenie, Moskva, 159 pp.
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Breivel, I. A.
1959
Spiriferidae and Atrypidae, pp. 52-73. In: A. N. Khodalevich et al. (eds.)
Brachiopods and Corals from the Eifelian Bauxite Beds of the Eastern Slopes of the Central and Northern Urals
Ministerstvo Geologii i Okhrani Nedr SSR, Uralsk Geologicheskoe Upravlenie, Moskva, 159 pp.