Covered bridge
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- Covered Bridges Capture the Essence of Chester County’S Brandywine Valley
- Covered Bridge Security Manual
- Low Clearance and Bridge Information
- Covered Bridges Nhl Context Study ======B
- Chapter 2: Literature Review
- Covered Bridge Manual
- "Covered Bridges of Indiana County" Brochure
- Covered Timber Bridge Committee Collection, 1930–1979
- Historic Metal Truss Bridge Reevaluation
- Guide to the Historical Bridge Form V5.0 (Pdf)
- Must a Bridge Be Beautiful Too?
- Kings Covered Bridge Rehabilitation, Somerset County, PA
- The Covered Bridges of Preble County
- Indiana Historic Bridge Inventory
- A Guide to the Covered Bridges of Parke County, Indiana
- Covered Bridges NHL Context Study