contemporary french map of the first battle of the Marne, day five, 9th september 1914
Anonymous. Scan and adjustments by  <a href="//commons.wikimedia.org/wiki/User:Jebulon" title="User:Jebulon">Jebulon</a>
1919
"L'ALBUM DE LA GRANDE GUERRE" of french magazine "L'ILLUSTRATION" (2vol.)