Willers, Friedrich Adolf, 1883-1959.
Practical analysis; graphical and numerical methods; tr. by Robert T. Beyer.
Approximation theory.
Numerical analysis.
Approximation theory. fast (OCoLC)fst00811829
Numerical analysis. fast (OCoLC)fst01041273
Beyer, Robert T. (Robert Thomas), 1920-2008 translator.