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Oklahoma Biological Survey vehicles through the years

The following photos demonstrate how field vehicles have changed through the years.

Ortenburger expedition
Ortenburger expedition, 1920's.
G.L. Cross expedition
Dr. George Lynn Cross leads a botanical field trip in the 1930's.
1997 on the Kiamichi
In the 1990's many Oklahoma rivers were surveyed for fish and mussels via canoe.

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