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NATIONAL ARCHIVES AND RECORDS SERVICE WITHDRAWAL SHEET (PRESIDENTIAL LIBRARIES) FORM OF CORRESPONDENTS OR TITLE DATE RESTRICTION DOCUMENT opened Letter 1. RN to Ithiel de Sola Pool w/incoming letter 1/6/51 & 10/3/96 FILE LOCATION series: 320 box: 212 folder: deSOLA POOL, Ithiel RESTRICTION CODES (A) Closed by Executive Order 12065 governing access to national security information. (B) Closed by statute or by the agency which originated the document. (C) Closed in accordance with restrictions contained in the donor's deed of gift. GENERAL SERVICES ADMINISTRATION GSA FORM 7122 (REV. 1-81) Reproduced at the Richard Nixon Presidential Library and Museum