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For your informational purposes :



Basics Of Space Flight - NASA - PDF 16.11MB - 311 pages
http://www9.zippyshare.com/v/33399835/file.html



Basic Orbit Mechanics - PDF 1.2MB - 24 pages
http://www62.zippyshare.com/v/18351676/file.html



Understanding Orbital Mechanics - PDF 4.4MB - 27 pages
http://www5.zippyshare.com/v/80831159/file.html



Basics of Space Flight: Orbital Mechanics - PDF .24MB - 23 pages
From : http://www.braeunig.us
http://www67.zippyshare.com/v/85366544/file.html



Orbital Mechanics Course Notes - PDF .74MB - 155 pages
David J. Westpfahl - Professor of Astrophysics,
New Mexico Institute of Mining and Technology
March 31, 2011
http://www32.zippyshare.com/v/10011672/file.html



Orbital Operations - PDF 1.39MB - 34 pages
http://www48.zippyshare.com/v/82153924/file.html