20号美国国道
外部链接
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维基共享资源中相关的多媒体资源：20号美国国道 |
- Galena Bypass project homepage
- Illinois Highway Ends: US 20
- Indiana Highway Ends: US 20
- In Search of...U.S. Route 20 in Ohio by Michael G. Buettner, February 2006
- US 20 Travelogue in New York页面存档备份，存于 at Empire State Roads
- "On Route 20, Where the Past Is Present": August 11, 2006, article in The New York Times Escapes section.
- Flickr Group页面存档备份，存于 for photos taken along US 20
- US 20 as USends.com
- Twenty West: The Great Road Across America—book about US 20
- Historic US Route 20 Association页面存档备份，存于 Site dedicated to the preservation and promotion of Historic US Route 20
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