DIFFERENTIAL EQUATIONS AND THE CALCULUS OF VARIATIONS
ELSGOLTS, L ELSGOLTS, L
DIFFERENTIAL EQUATIONS AND THE CALCULUS OF VARIATIONS - MOSCOW MIR PUBLISHERS 1970 - 440P.
515.35/ELS/DIF
DIFFERENTIAL EQUATIONS AND THE CALCULUS OF VARIATIONS - MOSCOW MIR PUBLISHERS 1970 - 440P.
515.35/ELS/DIF