51 | Add to Reading ListSource URL: fperez.orgLanguage: English - Date: 2011-03-02 12:34:06
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52 | Add to Reading ListSource URL: arxiv.org- Date: 2017-07-09 20:44:12
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53 | Add to Reading ListSource URL: www.arrl.org- Date: 2017-02-22 10:34:27
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54 | Add to Reading ListSource URL: arxiv.org- Date: 2017-12-05 20:37:03
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55 | Add to Reading ListSource URL: www.arrl.org- Date: 2018-02-28 14:22:40
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56 | Add to Reading ListSource URL: arxiv.org- Date: 2016-02-24 20:48:03
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57 | Add to Reading ListSource URL: coscup.org- Date: 2011-05-19 23:27:56
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58 | Add to Reading ListSource URL: www.arscitizen.org- Date: 2017-07-13 01:05:42
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59 | Add to Reading ListSource URL: arxiv.org- Date: 2016-02-29 22:30:53
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60 | Add to Reading ListSource URL: arxiv.org- Date: 2018-03-11 20:21:00
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