Elementary Partial Differential Equations by Berg & McGregor (1966 VTG HC)

Partial Differential Equations of Mathematical Physics Webster 1950 Hardcover

Introduction To The Differential Equations Of Physics by L. Hopf,Dover,PB,1948

Y Charles Li / Chaos in Partial Differential Equations 2004

Partial Differential Equations of Mathematical Physics 1950 2nd Ed A.G. Webster

An Elementary Treatise Differential Equations (H.T.H.Piaggio - 1949) (ID:24509)

"Partial Differential Equations of Mathematical Physics" Bateman *1944* 1st Ed.

1964 Lectures on Partial Differential Equations by I.G. Petrovsky Hardcover Book