Short description: In Russian. Knizhnik, Ivan Sergeevich. Pyotr Lavrov. Moscow: All-Union State of Political and Exiled Settlers, 1930: type of gas. Pravda. The image is provided for reference only. It may reflect condition of one of the available copies or only help in identifying the edition. Please feel free to contact us for a detailed description of the copies available. SKU9203681