Pilot's handbook of aeronautical knowledge / 
U.S. Department of Transportation, Federal Aviation Administration. 
 - Washington, D.C. :  The Administration :  [Supt. of Docs., U.S. G.P.O., distributed],  1971. 
 - v, 207 p. :  ill. (some col.), maps. 
<br/><br/> "AC 61-23A"--Cover. 
<br/><br/><label>LCCN: </label>90012112     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics--Handbooks, manuals, etc.<br/>Air pilots--Handbooks, manuals, etc.
<br/><br/><label>Report. No.: </label>AC 61-23B