DOE - Cannabis Science Task Force Steering Committee (October 28, 2020) - Proficiency Testing Work Group - Presentation Washington State Department of Ecology (DOE) Source https://www.ezview.wa.gov/...uments/CannabisSTF/October%20PTW%20Presentation.pdf Published: Friday October 30, 2020 10:43 AM Replications Cannabis Observer Information Set Membership DOE - Cannabis Science Task Force Steering Committee (October 28, 2020) - Information Set