| History | Period |
|---|---|
| Simine Short, Ed. Via Airmail: An Aerophilatelic Survey of Events, Routes, and Rates (Chicago: The American Air Mail Society), 1992. This book is a cross-section of US airmail history, routes, and rates. It is not comprehensive. | Early air mail to 1989 |
| Routes | Period |
|---|---|
| Simine Short, Ed. Via Airmail: An Aerophilatelic Survey of Events, Routes, and Rates (Chicago: The American Air Mail Society), 1992. This book is a cross-section of US airmail history, routes, and rates. It is not comprehensive. | Early air mail to 1989 |
| Rates | Period |
|---|---|
| Simine Short, Ed. Via Airmail: An Aerophilatelic Survey of Events, Routes, and Rates (Chicago: The American Air Mail Society), 1992. This book is a cross-section of US airmail history, routes, and rates. It is not comprehensive. | Early air mail to 1989 |