| VHF - UHF - MW Newsletter - IARU Region 1 - 2019 r. |
| VHF - UHF - MW Newsletter - IARU Region 1 - 2019 r. 84 Edycja 12 grudzień 2019 r. https://www.iaru-r1.org/images/VHF/newsletters/Newsletter84.pdf https://translate.google.com/translate?hl=&sl=en&tl=pl&u=https%3A%2F%2Fwww.iaru-r1.org%2Fimages%2FVHF%2Fnewsletters%2FNewsletter84.pdf&sandbox=1 |