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Photograph

Workers at Mirror Lake Bridge Construction

Date: 1960
Description: View from below looking up towards workers constructing and reinforcing the forms for the footings of the interstate highway bridge at Mirror Lake.
Photograph

International TD-20 Crawler Tractor with Drott Shovel

Date: 1960
Description: Color photograph of an International TD-20 crawler tractor (TracTracTor) with attached Drott shovel loader.
Photograph

Experimental Crawler Tractor

Date: 1960
Description: Slightly elevated view of three men working with an experimental crawler tractor indoors. Caption reads: "Experimental Crawler Tractor Equipped with a Turb...

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