Nationaal Geografisch Instituut (NGI) - Belgium Belgium : In Flanders Fields - WW1 Tourist Map

An excellent colour double sided map of 1st World War battle sites in Belgium, along with the locations of graveyards, memorials, museums fortifications, forts, bunkers, pillboxes, batteries, craters and the front line in 1917.  This is both interesting and a good research resource for anyone researching WW1 history. The reverse includes an index of dates and the places relevant to those dates and the movement of  the front line.