Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Nancy Clark, during her philatelic career, dedicated much of her time with children, developing in them an interest in stamp collection. She assisted Boy Scout groups with philatelic activities that led to boys obtaining badges for stamp collecting. She also introduced stamp collecting to grammar school students and helped them develop skills in exhibiting their displays of stamps. Clark was also very active with both the national and international philatelic organizations. She was a member of the American Philatelic Society where she served on various committees, was director at large, and was appointed society treasurer. She was also a Fellow of the Royal Philatelic Society London. She was appointed Interpretive Master Planner for the Spellman Museum of Stamps and Postal History in 2010.

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