http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f7-subject=Postmarks -- United States -- Catalogs) https://catalog.wrhs.org/collections/search?docsPerPage%3D100;f7-subject%3DPostmarks%20--%20United%20States%20--%20Catalogs Results for your query: docsPerPage=100;f7-subject=Postmarks -- United States -- Catalogs Thu, 01 Jan 1970 12:00:00 GMT American stampless cover catalog: the standard reference catalog of American postal history. Sampson, Edward Norton, 1901-, Wishnietsky, Benjamin., Skinner, Hubert C., Sampson, Edward Norton, 1901- 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 American stampless cover catalog: the standard reference catalog of American postal history. Phillips, David G. 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 The David S. Clark collection of patriotic Civil War envelopes & covers. Western Reserve Historical Society Library., Bedell, Angi. 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 Civil War patriotic envelopes & covers. Western Reserve Historical Society Library., Bedell, Angi. 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