Okladnikov, A. P. (1977). Petroglify Verkhneĭ Leny. Nauka, Leningradskoe otd-nie.
Chicago Style (17th ed.) CitationOkladnikov, A. P. Petroglify Verkhneĭ Leny. Leningrad: Nauka, Leningradskoe otd-nie, 1977.
MLA (8th ed.) CitationOkladnikov, A. P. Petroglify Verkhneĭ Leny. Nauka, Leningradskoe otd-nie, 1977.
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