http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f8-subject=Postmarks -- United States -- History) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f8-subject%3DPostmarks%20--%20United%20States%20--%20History Results for your query: docsPerPage=100;f8-subject=Postmarks -- United States -- History Thu, 01 Jan 1970 12:00:00 GMT The first hundred years of United States territorial postmarks 1787/1887. Chase, Carroll., Cabeen, Richard McP. https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Cyclopedia of United States postmarks and postal history. Norona, Delf, 1895- https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT Postal markings. Konwiser, Harry Myron, 1879- https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc https://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT