Short description: In Russian. Rein, Alexander Oskarovich. Some cases of variable-length pendulum movement. Vladivostok: type - East Polytechnic Institute, 1930. Nekotorye sluchai dvizheniya mayatnika peremennoy dliny. In Russian /Some cases of variable-length pendulum movement.. 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. SKU9231589