History of philosophy : vol 1 / Johann Erdmann ; tr. into English by Williston S. Hough. Erdmann, Johann 1805-1892. Hough, Williston S, 1860-1912, tr. Philosophy History. 109 ERH Includes index. London : Swan Nonnenschein, 1891. 1891. 1973 Text v. ; http://catalog.hathitrust.org/api/volumes/oclc/4705859.html http://catalog.hathitrust.org/api/volumes/oclc/855690.html eng Library of philosophy.