Short Wave Craft:
1930: Jun-Jul Aug-Sep Oct-Nov Dec (with Jan 1931)
1931: Jan (with dec 1930) Fev-Mar Apr-May Jun-Jul Aug-Sep Oct-Nov Dec
1932: Jan Fev-Mar Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1933: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1934: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1935: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1936: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
Short Wave & Television:
1937: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1938: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep
Radio & Television:
1938: Oct-Nov-Dec
1939: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1940: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep-Oct-Nov-Dec
1941: Jan-Fev-Mar-Apr-May-Jun-Jul-Aug-Sep
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