"Short description: In Russian. Parenago, Pavel Petrovich. Variable stars and how to observe them. Moscow; Leningrad: ONTI, Red. technical-theoretical liters, 1938 (K: ONTI type). Peremennye zvezdy i sposoby ikh nablyudeniya. In Russian /Variable stars and how to observe them. 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. SKU5329775"