Não informado. (2000). Trudy Imperatorskago Petrogradskago Obscestva Estestvoispytatelej. [s.n.].
Chicago Style (17th ed.) CitationNão informado. Trudy Imperatorskago Petrogradskago Obscestva Estestvoispytatelej. Petrograd, Rússia: [s.n.], 2000.
MLA (8th ed.) CitationNão informado. Trudy Imperatorskago Petrogradskago Obscestva Estestvoispytatelej. [s.n.], 2000.
Warning: These citations may not always be 100% accurate.