51![](https://www.pdfsearch.io/img/2205d85fbe498a9b752d800d4a7c93e2.jpg) | Add to Reading ListSource URL: selenianboondocks.comLanguage: English - Date: 2009-09-20 01:47:55
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52![](https://www.pdfsearch.io/img/db2147f9883a1f77f7c93cec6f69a021.jpg) | Add to Reading ListSource URL: propellants.ksc.nasa.govLanguage: English - Date: 2007-05-09 08:39:52
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53![](https://www.pdfsearch.io/img/93be6223daa135605d671d2973554911.jpg) | Add to Reading ListSource URL: copenhagensuborbitals.comLanguage: English - Date: 2012-09-14 07:55:05
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54![](https://www.pdfsearch.io/img/c48a4f0ac707ea5b05b9f289a090f77f.jpg) | Add to Reading ListSource URL: pershingmissile.orgLanguage: English - Date: 2008-11-06 01:26:20
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55![](https://www.pdfsearch.io/img/b0d2a8fc175ce50b626c9a5b4f3db422.jpg) | Add to Reading ListSource URL: pdf.aiaa.orgLanguage: English - Date: 2009-09-01 10:26:32
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56![](https://www.pdfsearch.io/img/57e1022e344cd790c1aa26d17648c98c.jpg) | Add to Reading ListSource URL: www.blackknights.org.ukLanguage: English - Date: 2010-01-22 03:44:26
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