Conference on aircraft and the environment  
/ U. S. Department of Transportation 
 - U. S. A.:   U. S. Department of Transportation,   1971 
 - 97p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics
<br/><br/><label>Subjects--Index Terms: </label>Environmental effects 
<br/><br/><label>Universal Decimal Class. No.: </label>629.7:504.3(082.2)   / L1