TY  - BOOK
AU  - Elsgolc,L.E.
TI  - Calculus of variations
AV  - QA315 .E47 1961
U1  - 515.64 
PY  - 1961///
CY  - London
PB  - pergamon press
KW  - calculas
N1  - Includes index; Mathematics, Physics & Statistics
ER  -