Discusses history of the communist movement in Thailand, its relationship with other SE Asian communist movements, communist "front" organizations in Thailand, and the role of communists in Chinese and Vietnamese minority groups. Reports on Chinese Communist Party (CCP) activities in Thailand. Discusses Communisty Party of Thailand: growth, activities in the Northeast and South, cooperation with the CCP, and participation in training programs, with recruits form Vietnam and Laos, in Peking and Yunnan. Reports on recruitment practices of CCP in Thailand and Laos. Discusses locations of active communist groups in the NE and South, propaganda themes, adoption of Maoist tactics, and use of terrorism and guerrilla attacks. Includes copies of communist propaganda letters and documents. [TAIC]