mathematics ordinary differential equations book, by wilfred kaplan, 1962 4th Pr

Elementary Differential Equations 3rd Edition, Earl D. Rainville, 1964

Nonlinear Ordinary Differential Equations

Lot of 2 Vtg DIFFERENTIAL EQUATIONS Books Salvadori Schwarz 1956 Phillips 1956

Partial Differential Equations in Physics - Arnold Sommerfeld - 1949 Hardcover

Introduction to Ordinary Differential Equations

Elementary Differential Equations by William E. Boyce & Richard DiPrima 1969 HC

Nonlinear Differential Equations and Dynamical Systems, Verhulst Springer 1996