"Contact Information (页面存档备份,存于互联网档案馆)." United States Copyright Office. Retrieved on October 20, 2012. "James Madison Memorial Building. The U.S. Copyright Office is located on the 4th floor."
web.archive.org
"Contact Information (页面存档备份,存于互联网档案馆)." United States Copyright Office. Retrieved on October 20, 2012. "James Madison Memorial Building. The U.S. Copyright Office is located on the 4th floor."