UN Partisan Warfare in Korea, 1951-1954:
http://carlisle-www.army.mil/usamhi/DL/docs/45.pdf
This is a 209-page PDF file and is a fairly slow download. Whoever formatted it for PDF did a bad job reducing the file size (he or she probably did not change it to B&W), so it measures about 19 mB in size.
Miscellaneous other links relating to partisan/guerrilla warfare in the Korean War:
http://www.kimsoft.com/kr-ccrak.htm