. . "Differential equations." . . "Equazioni differenziali." . . "MATHEMATICS / Calculus" . . "Periodische Differentialgleichung." . . "Funzioni armoniche." . . "Équations différentielles Solutions numériques." . . "Fonctions spéciales." . . "Partielle Differentialgleichung." . . "Mathieu, Fonctions de." . . "Ecuaţii diferenţiale." . . "Équations différentielles." . . . . "Periodic differential equations : an introduction to Mathieu, Lamé, and allied functions, by F. M. Arscott" . . . "Periodic Differential Equations" . . "Periodic differential equations : an introduction to Mathieu, Lamé, and allied functions" . . "Periodic differential equations : an introduction to Mathieu, Lamé, and allied functions"@en . . . . "Periodic differential equations an introduction to Mathieu, Lamé, and allied functions"@en . . . "Periodic differential equations" . "Periodic differential equations"@en . . . . . . "Periodic differential equations an introduction to Mathieu, Lamé and Allied functions" . . . . . . . . . "Periodic differential equations : An introd. to Mathieu, Lamé, and allied functions" . . . . . "Periodic differential equations : an introduction to Mathieu, Lamé, and Allied functions" . . . . . "Periodic differential equations : an introduction to Mathieu, Lame', and allied functions"@it . . "Periodic Differential Equations. An introduction to Mathieu, Lamé and allied functions"@en . . . . . . "Periodic differential equations; an introduction to Mathieu, Lamé, and allied functions"@en . "Periodic differential equations; an introduction to Mathieu, Lamé, and allied functions" . . . . . . "Periodic differential equations ; an introduction to Mathieu, Lamé, and allied functions"@en . . . "Electronic books"@en . . . . . . "MATHEMATICS / Mathematical Analysis" . . "Ecuaciones diferenciales lineales." . . "Fonctions harmoniques." . . "Harmonic functions." . .