Airborne automatic direction finder installations (low & medium frequency). 
 Airborne automatic direction finder installations (low and medium frequency) 

 - [Washington, D.C.,  1969]. 
 - v. 
<br/><br/> 7/7/69.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aids to navigation.
<br/><br/><label>Gov. Doc. Class. No.: </label>TD 4.8/2:20-63