http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Daniel Guggenheim, the man and the medal
Robert L. Zwart, revision editor ; G. Edward Pendray, Robert Serling, and other editors--dates unknown, prior to 1980.
"The history of the award, who was Daniel Guggenheim?, the medal, the medalists: 1929-1993, the rules of the award."