TY  - BOOK
AU  - Elsgolc, L.E
TI  - Calculus of variations
U1  - 515.64 
PY  - 1962///
CY  - London
PB  - Pergamon press  Ltd.
KW  - MCE
N1  - 0; 0; 0; 515_640000000000000_ELS
ER  -