Partial Differential Equations An Introduction 2nd Edition
Gunter Hellwig1964 年出版259 页ISBN:
Differential Diagnosis The Interpretation of Clinical Evidence
A.Mcgehee Harvey and James Bordley III1955 年出版665 页ISBN:
Elementary differential equations and boundary value problems
William E.Boyce and Richard C.DiPrima1965 年出版485 页ISBN: