IBUKI has collected togethered and indexed electronic (mostly PDF) editions of primary sources, books, articles and study guides for history, science and literature. The works of Philip Jourdain A Mathematical Paradox The Monist, Jan. 1910, Vol XX, pp 135-135. The Philosophy of Mr. B*rtr*and R*ss*ll The Monist, Oct. 1911, Vol XXI, pp 482-508. The Nature of Mathematics First Edition (1912) Revised Edition (1919) Existents and Entities The Monist, Jan. 1917, Vol XXVII, pp 142-151.