Presents the official documentary historical record of major U.S. foreign policy decisions and significant diplomatic activity. The series, which is produced by the State Department's Office of the Historian, began in 1861 and now contains more than 350 individual volumes. The volumes published over the last two decades increasingly contain declassified records from all the foreign affairs agencies.
Foreign Relations volumes contain documents from Presidential libraries, Departments of State and Defense, National Security Council, Central Intelligence Agency, Agency for International Development, and other foreign affairs agencies as well as the private papers of individuals involved in formulating U.S. foreign policy.... -- Office of the Historian of the U.S. Department of State
The series is published in paper, but many of the volumes have been digitized either by the Department of State or the libraries at the University of Wisconsin at Madison or the University of Illinois at Chicago. The Department of State volumes begin with 1945/50, while those digitized by the University of Wisconsin and Illinois at Chicago cover the years 1861-1960. UK Libraries has these volumes in paper in the Government Publications section of Young Library (call number S1.1).