Short description: In Russian. Nagrodsky, Leonid Vladimirovich. Floating Bridges, Rigidity and Methods of Strengthening. Leningrad: Military Communications Department at the Leningrad Institute of Railway Engineering, 1930. 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. SKU9220645