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Windward Performance
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<h2 id="external-links">External links</h2> <ul><li><a href="http://www.windward-performance.com">Windward Performance</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 138. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X <a href="/wiki/ISSN_(identifier)" target="_blank">/wiki/ISSN_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>The Perlan II project continues to develop, 24-25. FreeFlight, the Journal of the Soaring Association of Canada, Autumn, 2011. <a href="/wiki/Soaring_Association_of_Canada" target="_blank">/wiki/Soaring_Association_of_Canada</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>