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Test drilling in North Canadian River Valley, Canadian County, Oklahoma, by C.R. Frazier,

By Oklahoma-Texas Water Science Center
A new length of drill-pipe is being raised into position so that hole can be deepened. 
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Detailed Description

Test drilling in North Canadian River Valley, Canadian County, Oklahoma; Photograph by C.R. Frazier. A new length of drill-pipe is being raised into position so that hole can be deepened. 

Sources/Usage

Public Domain.