The function of the lexicon in transformational generative grammar / By Rudolf P. Botha.

Twentieth Century Conseptions Of Language : mastering the metaphysics market / Rudolf P. Botha

Rhetoric and argumentation

Pulau-Pulau terluar dan batas wilayah nasional status delimitasi batas wilayah nasional Rudolf W.Matindas,Klaas J.Villanueva

China at work : an illustrated record of the primitive industries of China's masses, whose life is toil, and thus an account of Chinese civilization / Rudolf P. Hommel