Copies of military cyphers from occupied Poland, X.1944-IV.1945

PRM - Council of Ministers (Cabinet Office). 1939 - 1991. PRM Council of Ministers (Cabinet Office). Archive of the Prime Minister 1939 - 1945.

Copies of military cyphers from occupied Poland, X.1944-IV.1945 PRM – Council of Ministers (Cabinet Office). 1939 – 1991. PRM Council of Ministers (Cabinet Office). Archive of the Prime Minister 1939 – 1945.