File:Engineering-assessment-of-two-cylinders-observed-at-the-Douma-incident-27-February-2019-1.pdf

Summary
Source: OPCW internal, provided to members of Working Group on Syria, Propaganda, and Media - explanation and assessment: http://syriapropagandamedia.org/working-papers/assessment-by-the-engineering-sub-team-of-the-opcw-fact-finding-mission-investigating-the-alleged-chemical-attack-in-douma-in-april-2018