Handbook of procedures for handling airspace matters, change 4. 

 - [Washington, D.C.,  1971]. 
 - [79] p. :  ill. 
<br/><br/> Handbook.  Aug. 3, 1971.  4to.  [Effective date Dec. 1, 1971. Issued in looseleaf form].  Distribution made by issuing office.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Airspace (Law)--United States--Handbooks, manuals, etc.
<br/><br/><label>GPO Item No.: </label>0431-C-04 
<br/><br/><label>Gov. Doc. Class. No.: </label>TD 4.8/2:7400.2 A/CH.4