Keywords: Petri dish at the Pacific Northwest National Laboratory.jpg en Petri dish at the Pacific Northwest National Laboratory 2010-09-01 http //picturethis pnl gov/picturet nsf/by+id/DRAE-8DBTWP Pacific Northwest National Laboratory US Department of Energy other versions PD-USGov Uploaded with UploadWizard Petri dishes Files by User Anna Frodesiak |