This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
US Aerial Mail advertisement in Aerial Age Volume . en US Aerial Mail advertisement in Aerial Age Volume page org page US Aerial Mail advertisement in Aerial Age Volume anonymous other versions PDUSGov United States Air Mail
Page 2023 Free-images.com. All images are Public Domain