http://www.helium.com/knowledge/174588-the-proper-way-to-prepare-a-letter-for-the-united-states-postal-service.xml Helium.com > Business (Other) > The proper way to prepare a letter for the United States Postal Service en-us Copyright Helium.com Mon, 07 Jul 2008 21:03:37 GMT Mon, 07 Jul 2008 21:03:37 GMT