The Online Books Page

Great Britain. Army. British Expeditionary Force

See also what's at Wikipedia, your library, or elsewhere.

• Great Britain. Army. British Expeditionary Force -- History

• The Lost Legion: The Story of the Fifteen Hundred American Doctors Who Served With the B. E. F. in the Great War (Springfield, MA: Press of the Loring-Axtell Co., 1926), by William Andrew Robertson Chapin (page images at HathiTrust)

• "The Infantry Cannot Do With a Gun Less": The Place of the Artillery in the British Expeditionary Force, 1914-1918 (c2003), by Sanders Marble (illustrated HTML and PDF files at gutenberg-e.org)

Items below (if any) are from related and broader terms.