Ordinary Differential Equations by I. G. Petrovski

Theory of Ordinary Differential Equations by E. A. Coddington & N. Levinson 1955

Ordinary Differential Equations by I. G. Petrovski

A First Course in Differential Equations : With Modeling Applications by Dennis

Differential Equations - Hardcover, by Blanchard Paul; Devaney - Acceptable

Differential Equations A Course in Mathematical Analysis by Edouard Goursat 1945

Topics In Ordinary Differential Equations By William D. Lakin

Introduction to Differential Equations By Mark H. Holmes