mandevu.net

The staff at the Documentation Center of Cambodia , keepers of an enormous archive of documents from the Khmer Rouge period and generally really helpful folks, recently made some of their publications available online in PDF form.  They have generously made this material available for free. 

 If you download the free copies and like what you read, support their generosity and buy hard copies.  You can pick them up at the DC-Cam office in Phnom Penh on Norodom Boulevard near the Independence Monument, as well as at Monument Books.  From overseas, email info@monument-books.com for information on ordering and shipping.  And no, nobody told me to plug the hard copies.  I just think that it is important to support institutions which make their publications available online for free.