Schedule for aeroplane engines. Type R.A.F. 4A

Battle engagements of German Divisions

Classification and engagement of army divisions in the western theatre

Extracts from German documents dealing with "Lessons drawn from the battle of the Somme"

The 1917 german long delay action fuze for demolition purpose (from german purpose)

German Anti-Aircraft Organization

The experiences of the german Ist Army in the Somme battle

Experience of recent fighting at Verdun

Diagram showing the organisation & defense of a Divisional Sector (from a german document captured in April, 1917)