TY  - BOOK
AU  - Feshchenko S F and others
TI  - Asymptotic methods in the theory of linear deffirential equations
T2  - Studies in Economics and Political Science, Ed. by W Pember Reeves,17
U1  - B333,1, K7 
PY  - 1967///
CY  - New York
PB  - American elsevier publishing company inc     
ER  -