TY  - BOOK
AU  - Krasnoselski M A
AU  -  Burd V sh
AU  -  Kolesov Yu S
TI  - Nonlienar almost periodic oscillations
U1  - B399N2, L3 
PY  - 1973///
KW  - Periodic Oscillations
N1  - Bibliography 319-324p
ER  -