Air freight service began at the Allentown Airport in August 1927.   The Royal Air Truck Ford Tri-Motor of Hartford Connecticut brought a shipment of typewriters to Frank Haberle, who owned an office equipment business at 113 North Sixth Street.  That address today is an Allentown Parking Authority deck.
Unknown author<span style="display: none;">Unknown author</span>
1927
Ann Bartholomew (Author), Carol M. Front (Author) (2002), Allentown (Images of America), Arcadia Publishing (April 8, 2002), ISBN-10: 0738509965