Subject
- Military intelligence8
- Demographic statistics4
- Indigenous populations4
- Irrigation4
- Military operations3
- Agriculture2
- Colonial administration2
- Geographical data2
- Historical geography2
- Military communications2
- Reference materials2
- Aerial operations1
- Cultivation1
- Geology1
- International relations1
- Marine navigation1
- Mesopotamian Campaign (1914-1918)1
- Military maps1
- Navigable rivers1
- Supplies1