Image:Duquenois levine step3.jpg
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current | 16:23, 4 February 2008 | 1,200×1,600 (72 KB) | Itub | ({{Information |Description=Duquenois-Levine test |Source=http://www.dea.gov/images_lab_processes.html |Date=2008-02-04 |Author=US DEA |Permission=http://www.dea.gov/multimedia.html (public domain) }} Category:Analytical chemistry [[Category:Marijuana]) |
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