Only a select number of employees have access to the trove of historical documents and products from the greeting card maker's history. Samantha Bradbeer, Hallmark’s historian, is one of them.

Hallmark Card Creators Tackle Father's Day. By ABC News. August 30, 2004, 2:39 PM. June 20, 2004 — -- At the Hallmark headquarters in Kansas City, Mo., 5,000 people are taking pride in the ...