The complete works of Herbert Spencer
Contains Spencer's works, author's edition, 7 vols. New York: D. Appleton & Co., 1892. The works of Herbert Spencer, Osnabrück: Otto Zeller, 1880. vols. 12,17,19. David Duncan. Life and letters of Herbert Spencer. New York: D. Appleton & Co., 1908. Herbert Spencer. Essays, scientific, political, and speculative, 3 vols. New York: D. Appleton & Co., 1892. Herbert Spencer. Various fragments. New York: D. Appleton & Co., 1898
電子書, English, 2001
Electronic ed
InteLex Corporation, Charlottesville, Va., 2001