TY  - BOOK
AU  - Bogoliubov, N.N.
AU  - Mitropolsky, Y.A.
TI  - Asymptotic methods in the theory of non-linear oscillation /(by) N.N. Bogoliubov, Y.A. Mitropolsky, Tr. from the Russian
U1  - 531.322 
PY  - 1961///
PB  - Hind. Pub. Corp.
ER  -