CRL owns the following sets from this series:

• Confidential U.S. diplomatic post records. Central America. El Salvador, 1930-1945 [Catalog Record]
• Confidential U.S. diplomatic post records. Central America. Nicaragua, 1930-1945 [Catalog Record]
• Confidential U.S. State Department central files. Argentina, 1955-1959  [Catalog Record]
• Confidential U.S. State Department central files. Mexico, February 1963-1966. Part 1, Political, governmental, and national defense affairs [Catalog Record]