sentences:  All of the issues are available on the secondary market, with both specialized dealers and internet auction services serving as important sources.Collectors value the medals in their original boxes, complete with the descriptive pamphlets that accompanied them.In 2010 the American Numismatic Society published the authoritative reference and history of both the Circle of Friends of the Medallion and the Society of Medalists, "American Art Medals, 1909-1995" by well known numismatic scholar David Thomason Alexander.