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Betekhtina, O. A.; Gorelova, S. G. (1978). Paleolandshafty zon uglenakopleniya i metodika ikh ispol'zovaniya dlya korrelyatsii [Paleolandscapes of coal accumulation zones and methods of their use for correlation]. In: Biostratigrafiya i paleobiogeografiya devona i karbona Aziatskoy chasti SSSR [Biostratigraphy and paleobiogeography of the Devonian and Carboniferous in the Asian part of the USSR]. Akademiya Nauk SSSR, Sibirskoye Otdeleniye, Trudy Instituta Geologii i Geofiziki [Academy of Sciences of USSR, Siberian Branch, Transactions of the Institute of Geology and Geophysics]. 386: 20-29, pl. 3.