TY  - BOOK
AU  - Andronov, A. A.
AU  - Khaĭkin, S. Ė.
AU  - Lefschetz, Solomon,
TI  - Theory of oscillations
AV  - QA871 .A52
U1  - 531.32 
PY  - 1949///
CY  - Princeton
PB  - Princeton Univ. Press
KW  - Oscillations
N1  - A condensation of the author's Teorii͡a︡ kolebaniĭ (romanized form) v.1. pub. in 1937, made as part of the work on the project on non-linear differential equations under contract with the Office Naval Research, Prject NR 043-942; "Supplementary reading list": p. 349
ER  -