Asymptotic methods in the theory of non-linear oscillations/ N.N. Bogoli︠u︡bov and Y.A. Mitropolsky. Translated from Russian. Asimptoticheskie metody v teorii nelineĭnykh kolebaniĭ. English Bogoli︠u︡bov, N. N. (Nikolaĭ Nikolaevich), 1909-1992. Mitropolʹskiĭ, I︠U︡. A. (I︠U︡riĭ Alekseevich), 1917- joint author. Oscillations. Asymptotes. QA871 .B673 1961 521.382 BOA [Russian monographs and texts on advanced mathematics and physics. v. 10] Includes bibliography. Delhi, Hindustan Pub. Corp., [stamped: New York, Gordon and Breach Science Publishers] 1961. 1961. 1961 Text 537 p. eng engrus International monographs on advanced mathematics and physics Russian monographs and texts on advanced mathematics and physics ; v. 10.