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Photograph

Rock with Petroglyphs

Date: 1953
Description: Stone displaying ancient writing. The rock was on the grounds of International Harvester's Phoenix Proving Grounds. Opened in 1947, the proving ground was...
Photograph

TD-24 Crawler Tractor at Phoenix Proving Ground

Date: 1953
Description: Man on a TD-24 crawler tractor looks down over International Harvester's Phoenix Proving Ground. Opened in 1947, the proving ground was used by Internation...
Postcard

Crystal Cave Gift Shop & Cafe

Date: 1953
Description: Text on front reads: "Crystal Cave Gift Shop & Cafe, Spring Valley, Wisconsin". On reverse it reads: "Crystal Cave, Spring Valley, Wisconsin. Highway Wisco...

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