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Kotlyar, Zakharov & Kropacheva |
1989 |
Pozdnepermskii etap evoliutsii organicheskogo mira. Midiinskii yarus SSSR. [Kotliar,G,V,, Zakharov,Yu.d., Kropacheva,G.S., Pronina,G.P., Chediya,I.O. & Burago,V.I.] (Evolution of the latest Permian biota. Midian stage.)
Zakharov,Y.D., in "Nauka", 64-66, 126-133, figs.9-12, pls.25-26, Leningrad.
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