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Why does the US Postal Service use costly materials to make stamps
How is it the U.S. Postal Service has such low letter postage for
Postage Prices Just Went Up Again. Here's How Much Stamps Cost Now - CNET
U.S. Postal Service proposes price hikes for postage stamps for 2024
United States Postal Service, History, Evolution, & Tracking
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Why did the US Postal Service sponsor Lance Armstrong? - Quora