Ordovician system in Kazakhstan and Middle Asia :
correlation charts and explanatory notes /
by I.F. Nikitin ... [et al.] ; International Union of Geological Sciences ; in cooperation with Interdepartmental Stratigraphic Committee of USSR ... [et al.]

APA Citation

Nikitin, I. F. (Igorʹ Fedorovich)., International Union of Geological Sciences. International Subcommission on Ordovician Stratigraphy., Mezhvedomstvennyĭ stratigraficheskiĭ komitet SSSR., International Union of Geological Sciences. (1986). Ordovician system in Kazakhstan and Middle Asia: correlation charts and explanatory notes. Ottawa, Ontario, Canada: IUGS.

MLA Citation

Nikitin, I. F. (Igorʹ Fedorovich), International Union of Geological Sciences. International Subcommission on Ordovician Stratigraphy, Mezhvedomstvennyĭ stratigraficheskiĭ komitet SSSR, and International Union of Geological Sciences. Ordovician System In Kazakhstan And Middle Asia: Correlation Charts And Explanatory Notes. Ottawa, Ontario, Canada: IUGS, 1986.