The correspondence in NK/3/1-28 is arranged chronologically.
The files catalogued as 3/29-30 were identified as parts of larger filing systems. Those catalogued as 3/31-121 were found loose and in disarray. They have been catalogued individually and in an alphabetical sequence for ease of reference. Files on particular subjects may thus be found as part of 3/29-30 and in the appropriate place in the alphabetical sequence, 3/31-121.
The files catalogued as 3/122-146 relate to countries. Unless otherwise stated, the correspondence listed in this section was exchanged with academic colleagues in the countries concerned. They cover economic issues of common interest and occasionally arrangements for visits and lectures.