Graystone, P. <br/><br/>
Equivalent Headwinds at Heights of 30,000 feet & 40,000 feet along Air Routes 

 - London :   Her Majesty's stationery office 
 - p. 34 
 - Meteorologi .
<br/><br/><label>Subjects--Topical Terms: </label><br/>METEOROLOGIA
<br/><br/><label>Universal Decimal Class. No.: </label>551.5