Incoming Resources
- Earthmovers, by Lee Sullivan Hill
- Bulldozers at work, D.R. Addison
- Bulldozers, by Marv Alinas
- Earthmovers, by Hal Rogers
- Diggers, Amanda Askew
- Earth movers, by M. T. Martin
- Bulldozers, by M. T. Martin
- Diggers, by Marv Alinas
- Dump trucks, by Ray McClellan
- Bulldozers, Amanda Askew
- Diggers, by Derek Zobel
- Graders, by Hal Rogers