TY  - BOOK
AU  - Craggs, J. W.
TI  - Calculus of variations
T2  - Problem solvers ; no.9
SN  - 0045170096
U1  - 515.64 
PY  - 1973///
CY  - London
PB  - George Allen & Unwin
KW  - Calculus of variations
ER  -