| Radioteleskop Arecibo runął |
| "CQ EME, this is KP4AO, Arecibo Observatory" [březen 2010] http://www.ok2kkw.com/arecibo_march2010report.htm https://translate.google.com/translate?sl=cs&tl=pl&u=http://www.ok2kkw.com/arecibo_march2010report.htm Courtesy OK2KKW |