| Author (Corporate) | United Nations: Economic Commission for Europe |
|---|---|
| Publisher | UN |
| Publication Date | 2008 |
| Content Type | Key Source, Overview |
| Source Link | http://www.unece.org/trans/main/tunnels.html |
| Countries / Regions | Europe |
| Record URL | https://www.europeansources.info/record/?p=421077 |
