Ivachnenko, M. F. (1979). Permskie i triasovye prokolofony Russkoj platformy.
Chicago Style (17th ed.) CitationIvachnenko, Michail Feodos'evič. Permskie I Triasovye Prokolofony Russkoj Platformy. 1979.
MLA (9th ed.) CitationIvachnenko, Michail Feodos'evič. Permskie I Triasovye Prokolofony Russkoj Platformy. 1979.
Warning: These citations may not always be 100% accurate.