Volkova, N.S. (1939). K stratigrafii verkhnetretichnykh otlozheniy Stavropol'ya [Stratigraphy of the Upper Tertiary deposits of the Stavropol Territory]. Trudy po geologii i mineral'nym resursam Severnogo Kavkaza. 4: 3-28.
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Volkova, N.S.
1939
K stratigrafii verkhnetretichnykh otlozheniy Stavropol'ya [Stratigraphy of the Upper Tertiary deposits of the Stavropol Territory]
Trudy po geologii i mineral'nym resursam Severnogo Kavkaza