Previous series unregistered
1940-1963: CRS A , Subject nidex cards for classified files in CRS A571, correspondence files, annual single number series, 1940-1963
Summary heading
Function and purpose
These white lined cards record appropriate file numbers and file locations by subject of the classified files in CRS A571, correspondence files, annual single number series, and CRS A3720, correspondence files, annual single number series, for the period 1964-1976. Between 1964 and 1976 the classified files had and "O" infix to denote their status as classified files.
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