Mixed 31 May 1937 -26 June 1937 1 March 1938-27 April 1938 Β-13 Agora:Notebook:Β-13 Notebook Agora Agora:NotebookPage:Β-13-1::/Agora/Notebooks/Β/Β 013/Β 013 001.jpg::1263::2048 Mixed 1 May 1938- 4 July 1938, December 1938 1 March 1939 7 July 1954-30 July 1954 Β-14 Notebook Agora:Notebook:Β-14 Agora:NotebookPage:Β-14-1::/Agora/Notebooks/Β/Β 014/Β 014 001.jpg::1229::2048 Agora