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.. Please feel free to contact us for a detailed description of the copies available. SKU9231589