The Office of the Federal Register (OFR) began publishing the Public Papers of the Presidents series in 1957 as an official publication of United States Presidents' public writings, addresses, and remarks (1 CFR 10). The series provides an historical reference covering the administrations of Presidents Hoover, Truman, Eisenhower, Kennedy, Johnson, Nixon, Ford, Carter, Reagan, Bush, and Clinton. (The papers of President Franklin Roosevelt were published privately before the commencement of the official Public Papers series). Currently, volumes are published approximately twice a year, and each volume covers approximately a 6-month period.