In Russian. Gaida, Roman Panteleymonovich. Approximate Lorenz invariance in the classical mechanics of the particle system. Kiev: 1972-. Priblizhennaya Lorents-invariantnost v klassicheskoy mekhanike sistemy chastits. In Russian/Approximate Lorenz invariance in classical particle system mechanics. All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU6793310