Cooper, Grace Rogers. <br/><br/>
Thirteen-star flags: keys to identification. 

 - Washington  Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]  1973. 
 - vii, 62 p.  illus.  27 cm. 
 - Smithsonian studies in history and technology, no. 21 .
 - Smithsonian studies in history and technology  no. 21. .
<br/><br/>Bibliography: p. 59-60. 
<br/><br/><label>LCCN: </label>72008229 //r86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Flags--United States.
<br/><br/><label>LC Class. No.: </label>CR113  / .C72 
<br/><br/><label>Dewey Class. No.: </label>929.9/0973