Lupyak, Edward, and Historic American Engineering Record. Bridge Comparison: Little Pigeon River Bridge, Townsend Wye Bridge, Sinks Bridge, Cataloochee Creek Bridge. Library of Congress Prints and Photographs Division: Historic American Engineering Record, 1996.

Lupyak, Edward, and Historic American Engineering Record. Design Principles - Great Smoky Mountains National Park Roads & Bridges. Library of Congress Prints and Photographs Division: Historic American Engineering Record, 1996.

Historic American Engineering Record, and Edward Lupyak. Reference Map - Great Smoky Mountains National Park Roads & Bridges. Library of Congress Prints and Photographs Division: Historic American Engineering Record, 1996.

Historic American Engineering Record, and Edward Lupyak. Title Sheet - Great Smoky Mountains National Park Roads & Bridges, Gatlinburg, Sevier County, TN. Library of Congress Prints and Photographs Division: Historic American Engineering Record, 1996.