Summarize Notebook with entries from May to Dec 69, detailing organization and activities of Military Intelligence Section of B2 in Sub-Region 4, COSVN. Notes on personnel, including 12 cadre and members. Included are the structure and issues B2 faced, such as shortage of radios and agents, loss of informants, etc. Documents intelligence on US, Thai, and RVNAF units, sketches of enemy posts, and observations.