U.S. airworthiness certificates & authorizations for operation ... aircraft. 
 U.S. airworthiness certificates and authorizations for operation ... aircraft 

 - [Washington, D.C.,  1969]. 
 - v. 
<br/><br/> 1/11/69.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Airworthiness certificates--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>TD 4.8/5:20-65