Introduction to Partial Differential Equations by Don Greenspan (1961 hardcover)

Advanced Ordinary Differential Equations K O Friedrichs Hardback Maths Book 1967

Ordinary Differential Equations & Stability Theory : An Introduction

Introduction to Partial Differential Equations Stephenson, G. Paperback (16a)

Nonlinear Ordinary Differential Equations

Introduction to the Differential Equations of Physics L. Hopf Dover Pub PB 1948

Elementary Differential Equations with Linear Algebra by albert rabenstein

Introduction to Partial Differential Equations Hardcover