British Standard Glossary of Aeronatical Terms 

 - London :   British Standards Institution,   1940. 
 - p. 165 
 - nro 185-1940 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>DICCIONARIO AERONAUTICO<br/>INGLES
<br/><br/><label>Universal Decimal Class. No.: </label>[038]629.7=111