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<h2 id="references">References</h2> <ol> <li id="fn:1"><p>Rotorcraft Flying Handbook. Skyhorse Publishing Inc. July 1, 2007. ISBN 9781602390607. Retrieved February 18, 2015. <a href="9781602390607" target="_blank">9781602390607</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>