Hudson&amp;rsquo;s &amp;ldquo;Instrument Flying Made Easy&amp;rdquo; 
AOPA&amp;rsquo;s Spatial Disorientation Flyer 
David Hunter/FAA Spatial Disorientation Study 
&amp;ldquo;Airplane Flying Handbook&amp;rdquo; Ch. 16 
&amp;ldquo;Instrument Flying Handbook&amp;rdquo;