In Russian. Lebedeva, Volga Ivanovna. Lectures on the theory of oscillation of mechanical systems. Riga: 1970. Lektsii po teorii kolebaniy mekhanicheskikh sistem. In Russian /Lectures on the theory of mechanical system oscillations . 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. SKU7150226