Short description: In Russian. Polyakov, Georgy Dmitrievich. Manual on Hydrochemistry for Fish Farmers. Moscow: Food Promiszdat: Type. Moscow Cardboard Factory, 1950. Posobie po gidrokhimii dlya rybovodov. In Russian /Hydrochemistry Manual for Fish Farmers . 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. SKU6007077