2nd meeting held in London, 7-8 Nov. 2005, and 3rd meeting held in Dessau (Germany), 13-14 Mar. 2006. Annexes (p. 7-11): 1. Annotated outline of the report on particulate matter to be submitted to the 39th session of the Working Group on Strategies and Review -- 2. Workplan for 2006-2007.