by E. W. Burgess, Robert Ezra Park
by Charles Victor Langlois, Charles Seignobos
by Herbert Augustus Strong, Willem Sijbrand Logeman, Benjamin Ide Wheeler
by Henry Eldridge Bourne, Elbert Jay Benton
by John Wood Campbell
by Murray Leinster
et de France en Savoie, en Piémont et dans la Suisse, pendant les 8e, 9e et 10e siècles de notre ère
by Joseph Toussaint Reinaud
by Archie Frederick Collins
The Master-key to Progress
by Bradley A. Fiske
Curious Facts and Characteristic Sketches
by Anonymous
by William Henry Doolittle
by A. Russell Bond
by Philip Gengembre Hubert
by Henry Robinson
with Chapters on Discovery
by George Iles
, Area, Hearings, Part 1
by United States Congress House Committee on Un-American Activities