File:PSM V41 D630 Students laboratory at woods hole mass.jpg
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![File:PSM V41 D630 Students laboratory at woods hole mass.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/PSM_V41_D630_Students_laboratory_at_woods_hole_mass.jpg/800px-PSM_V41_D630_Students_laboratory_at_woods_hole_mass.jpg?20151201005021)
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