"elscots, l . "
differential equations and the calculus of variations: / l.. elscots - ed. - ussr : mir publishers . - ", 450p.; 22 cm."
hard cover
QA371 / .E37 1970
differential equations and the calculus of variations: / l.. elscots - ed. - ussr : mir publishers . - ", 450p.; 22 cm."
hard cover
QA371 / .E37 1970