TY  - BOOK
AU  - Elsgolts, L
AU  - Yankovsky, George
TI  - Differential Equations and the Calculus of Variations
U1  - 515.35 
PY  - 1973///
CY  - Moscow
PB  - Mir Publishers
KW  - Calculus
KW  - Mathematics
N1  - 2 books in ML and 1 book in CL
ER  -