: Covers the United States, United Nations, and countries from A to B (e.g., Australia, Brazil).
: Covers countries from P to Sl (e.g., Philippines, Russia).
: Covers countries from So to Z (e.g., Spain, Vietnam).
: Covers countries from C to F (e.g., Canada, China, France).
Scott 2007 Standard Postage Stamp Catalogue Vol... — Essential & Confirmed
: Covers the United States, United Nations, and countries from A to B (e.g., Australia, Brazil).
: Covers countries from P to Sl (e.g., Philippines, Russia).
: Covers countries from So to Z (e.g., Spain, Vietnam).
: Covers countries from C to F (e.g., Canada, China, France).