Flag of Democratic Kampuchea
Flags of the World - Cambodia flag history

See also:

http://einestages.spiegel.de/hund-images/2008/03/31/96/e2fffb5b15142c2de5aeb6ee3de0a0bc_image_document_large_featured_borderless.jpg
This (SVG on base of source) was created by me. See File History, below, for details.