Publications on "Distributed Communications" Series - Documents from Paul Baran from RAND Corporation, number of memoranda propsing a digital communications network for military us that could still function after sustaining heavy damage from an enemy attack. - http://www.rand.org/publications/classics/baran.list.html
ArpaNet Maps - Scanned maps of the network for twelve distinct periods from December 1969 to March 1977. - http://som.csudh.edu/cis/lpress/history/arpamaps/