Ludwig Wittgenstein
Tractatus Logico-Philosophicus
On Certainty (Harper Perennial Modern Thought) (English and German Edition)
Tractatus Logico-Philosophicus
Remarks on the foundations of mathematics
Tractatus logico-philosophicus (Spanish Edition)
Wittgenstein Lectures and Conversations on Aesthetics, Psychology, and Religious Belief
Notebooks, 1914-1916
Letters from Ludwig Wittgenstein with A Memoir (English and German Edition)
Remarks on Colour