TY  - BOOK
AU  - Gelfand, I. M.
TI  - Calculus of variations
U1  - 515.64 SIL 
PY  - 1963///
CY  - Englewood Cliffs
PB  - : Prentice-Hall
KW  - Calculus of variations
KW  - Calculus
KW  - I M Gelfand
KW  - S V Fomin
KW  - Elinor Donation
ER  -