- eBookConestoga Wagons in Braddock's Campaign, 1755Donald H. Berkebile
- eBookThe 1893 Duryea Automobile In the Museum of History and TechnologyDonald H. Berkebile
- eBookThe 1893 Duryea Automobile In the Museum of History and TechnologyDonald H. Berkebile
- eBookThe 1893 Duryea Automobile In the Museum of History and TechnologyDonald H. Berkebile