January 24, 2016 – dxradio.de

Radio Menschen und Geschichten

https://www.facebook.com/RadioMenschenGeschichten/

Alan Roe’s guide to music on shortwave

http://swling.com/blog/2016/01/b15-broadcast-period-alan-roes-guide-to-music-on-shortwave/

IARU Region 1 Monitoring System Soundfiles

http://www.iarums-r1.org/iarums/sound/main.html

Radio-Nostalgie: Alte Schätzchen

http://www.wdr2.de/kultur/rundfunkempfaenger-100.html

Ionosphere : Long Term Changes

https://www.researchgate.net/publication/222391260_Long-term_changes_in_the_ionosphere

Info via A-DX