The best starting point for finding presidential papers is the American National Biography online. In this guide, the entry for each president is linked directly to ANB (note, however, that this is a licensed resource for Princeton only; if you are at another academic institution, ask a librarian if you have access to it.) Look at the end of the ANB entry for information about presidential papers, published editions of the writings of that president, and recommended biographies. ANB also has links to the presidential libraries that house the personal papers of each president since FDR.
A compilation of the messages and papers of the presidents, 1789-1907. James D. Richardson. [New York]: Bureau of National Literature and Art, 1908, c1897.
Firestone J81 .U577 1908; also online at http://www.heinonline.org/HOL/Index?index=presidents/nsmpp&collection=presidents in a version that covers 1789-1929.
Public papers of the presidents of the United States. Washington: Federal Register Division, National Archives and Records Service, General Services Administration, 1929-2005, 2009
Firestone Library: Non Circulating (Fnc): J80 .U577; also online at http://www.heinonline.org/HOL/Index?index=presidents/pubpapers&collection=presidents. (For FDR see http://www.heinonline.org/HOL/Index?index=presidents/ppafdr&collection=presidents.)
Weekly compilation of Presidential documents.Washington, D.C. : Office of the Federal Register, National Archives and Records Service, General Services Administration, 1965-
Firestone J80 .W445; also online at http://heinonline.org/HOL/Index?index=presdocs/presdocs&collection=presidents and, for issues after 1995, in several other databases.
Executive Orders and Presidential Proclamations (1789-present) in ProQuest Congressional
Executive Branch Documents (1789-1939) in ProQuest Congressional
Records of the presidency: presidential papers and libraries from Washington to Reagan. Frank L. Schick, with Renee Schick and Mark Carroll. Phoenix: Oryx Press, 1989.
Firestone Library (F) CD3029.82 .S35 1989
How to research the presidency. Fenton S. Martin, Robert U. Goehlert. Washington, D.C.: Congressional Quarterly, c1996.
Firestone Library (F) Z1249.P7 M365 1996
The presidential National Security Files are a key resource for research on U.S. foreign policy and the presidency. They are arranged by administration and geographically. The series begins with the Eisenhower administration, but there is similar material in the microfilm set, President Harry S Truman’s office files, 1945-1953. Most are now available online in History Vault. See also National Security Council in Twentieth Century U.S. foreign affairs.