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

Introduction to Ordinary Differential Equations by Shepley L. Ross

Introduction to Linear Algebra and Differential Equations by Samuel Wolfenstein

1967 book Intro to Theory of Partial Differential Equations SMITH mathematics ph

1957 Differential Equations Applied In Science And Engineering Harold Wayland HC

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

1957 Differential Equations Applied In Science And Engineering Harold Wayland HC