Calculus of Variations Gelfand Fomin 1963 Hardcover Prentice Hall Math Textbook
Calculus of Variations by I. M. Gelfand and S. V. Fomin. Revised English Edition, translated and edited by Richard A. Silverman.
Calculus of Variations by I. M. Gelfand and S. V. Fomin. Revised English Edition, translated and edited by Richard A. Silverman.
