Publisher
- British Standards Institution24
- Routledge14
- Department for Transport13
- Palgrave Macmillan11
- Springer8
- Belfast Harbour Commissioners5
- Warrenpoint Harbour Authority5
- Londonderry Port and Harbour Commissioners4
- CRC Press/Balkema3
- KoganPage3
- University of Wales Press3
- [Belfast Harbour Commissioners]3
- Adlard Coles Nautical2
- Atlantic Books2
- Belfast Harbour2
- Bloomsbury Academic2
- Home Office2
- Marico Marine2
- Palgrave Pivot2
- Birlinn1