erc: who: Jamestown-Yorktown Foundation. Celebration 2007 Steering Committee what: Official Site of America's 400th Anniversary when: 2007 where: https://digital.library.unt.edu/ark:/67531/metadc270767/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/