Stamps.org
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Website: stamps.org
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About the APS - With members in more than 110 countries, the APS is the largest, non-profit organization for stamp collectors in the world. Founded in 1886, the APS serves collectors, educators, postal historians and the general public by providing a wide variety of programs and services. Our members enjoy access to the one of the world's largest philatelic libraries, a monthly award-winning magazine and safe avenues for buying and selling philatelic materials.
Website: stamps.org
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