Objective Knowledge: An Evolutionary Approach by Karl R. Popper 1981 PB Revised

Open Society and Its Enemies, Volume 1: The Spell of Plato by Karl R Popper

The Logic of Scientific Discovery (Routledge Classi... by Popper, Karl Paperback

Karl R. Popper Logic of Scientific Discovery Routledge Classics pbk NM

The Logic of Scientific Discovery by Karl Popper Paperback 2002 New

The Open Society and Its Enemies: Volume 1: The Spe... by Popper, Karl Paperback

The Open Society and Its Enemies - Volume - Paperback, by Karl R. Popper - Good

Karl Popper - The Formative Years, 1902-1945: Politics and Philosophy in: Used