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Secchi disk

Secchi disk, water quality test on a Great Lakes Education Program (GLEP) cruise on the Detroit River.

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Uploaded on October 10, 2013
Taken on June 9, 2009

Secchi disk

Secchi disk, water quality test on a Great Lakes Education Program (GLEP) cruise on the Detroit River.

230 views
0 faves
0 comments
Uploaded on October 10, 2013
Taken on June 9, 2009
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