Safety in air navigation :  hearings, 80th Congress, 1st session. 

 - [Washington, D.C.],  1947. 
 - 2 v. :  ill., pl., map. 
<br/><br/> Document for sale by the Superintendent of Documents, paper.  CRDP Program Historic Shelflist record. 
<br/><br/>Pt. 1. On safety in air navigation, Jan. 22-31, 1947 -- pt. 2. Feb. 4-Mar. 4, 1947. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics--Safety measures.<br/>Aeronautics, Commercial--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.IN 8/4:SA 1/8/