Subject
- Irrigation[remove]7
- Agriculture3
- Colonial administration2
- Cultivation2
- Geographical data2
- Historical geography2
- Military intelligence2
- Enquiries1
- Food supply1
- Harbour and coastal engineering1
- Marine navigation1
- Mesopotamian Campaign (1914-1918)1
- Military administration1
- Military communications1
- Military logistics1
- Military maps1
- Military operations1
- Military supplies1
- Navigable rivers1
- Postal services1