Westfield Stamp Club

United States Stamp Society

Western Cover Society

U.S. Philatelic Classics Society

Vermont Philatelic Society

The Stamp Insider

Texas Postal History Society

Philatelic Society of Lancaster County

Pennsylvania Postal History Society

New York 20th & 21st Century Postal History Blogger

New York 19th Century Postal History Blogger

New Jersey Postal History Society

Michigan Postal History

Indiana Postal History Society

Graphics Philately Association

Arkansas Postal History Society

American Philatelic Society

Connecticut Postal History

Colorado Postal History Society

Dakota Postal History Society

Broome County Postal History