English: Postage stamps of Paraguay and Bolivia with their maps during war for Grand Chaco, 1924-1935 ???????: ???????? ????? ???????? ? ??????? ? ?? ??????? ?????? ????? ?? ????? ????-????, 1924-1935 . 29 September 2007. scanned by User:Nickpo 40 ...
The Gran Chaco
The Gran Chaco
Chaco War - Wikipedia
Maps on Stamps : Paraguay | A Database of Cartophilately
What's better than maps or stamps? Maps on stamps! - Big Think