DOE - Cannabis Science Task Force Steering Committee (September 17, 2020) - Proficiency Testing Work Group - Presentation Washington State Department of Ecology (DOE) Source https://www.ezview.wa.gov/...nts/CannabisSTF/September%20Presentation%20PTWG.pdf Published: Monday September 21, 2020 10:47 AM Replications Cannabis Observer Information Set Membership DOE - Cannabis Science Task Force Steering Committee (September 17, 2020) - Information Set