Abzeichen: Militaer.: 
Vereinigte Staaten v. 
Nordamerika Brosch.1792 

Insignia United-States-armed-forces.-Insignia 
of the United States Armed Forces. 991 
illustr. in 32 pages of color, first complete 
color reproduction of all approved insignia, 
with full notes on the designs and symbols.Washington 
1943. S.652-714, Taf. I-XXXII. SO 
in: The National Geogra~hic Magazine. 83,6