Calculus of Variations and Partial Differential Equations of the First Order

Partial Differential Equations for Scientists and Engineers

Finite-Difference Methods for Partial Differential Equations by Forsythe Wasow

PARTIAL DIFFERENTIAL EQUATIONS IN PHYSICS Arnold Sommerfeld Hardback 1949 RARE

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

Finite-Difference Methods for Partial Differential Equations by G. Forsythe 1967

Partial Differential Equations (The - Paperback, by Lawrence C. Evans - New

PARTIAL DIFFERENTIAL EQUATIONS IN PHYSICS By Arnold Sommerfeld