Short description: In Russian. Zaitsev, Alexander Konstantinovich. Optical method of studying voltages. Leningrad: Publishing House of the Sev.-Subsidiary Region of the Industrial Bureau of the Supreme People's Exhibition of National Economy, 1927: State Trust Graphic Delo, b. 25 type and type named after Yves Fedorov. 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. SKU9198206