《American Postal Service, Second Edition》 - 免费有声读物

The history of the postal service in the United States goes back to the colonial period, but was established more formally with the issuing of postage stamps and regular delivery. Through small vignettes, this history is traced with attention to some of the more obscure, but fascinating aspects of the postal service and related topics, as well as the major aspects of the service. - Summary by Larry Wilson