File:John Herbert Hedley brochure.png

{{Information

|Description=Promotional materials for John Herbert Hedley's lecture "Rambling Through the Air."

|Source=University of Iowa Libraries.

|Date=192-

|Author=Not known

|Permission={{PD-Pre1978}}

}}

{{DYKfile|25 April|2012|type=image}}

{{Copy to Wikimedia Commons|bot=Svenbot|priority=true}}