- On the 9th Day by Charles Freitag at pics4everyone.com
- Case Harvest art by Charles Freitag at pics4everyone.com
- John Deere Art by Charles Freitag
- Case IH history
- Case Harvest by Charles Freitag and pics4everyone.com
- Planting Time by Charles Freitag and pics4everyone.com
- On the 9th Day – Charles Freitag – pics4everyone.com
- Charles Freitag – Pics4everyone. com – Case IH history
- Charles Freitag – Pics4everyone.com – Charles Freitag’s story from his website
- John Deere 4020 and it’s history