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Caption: "Boulder Dam Cement Mixers," c. 1935, shows the massive cement mixers used to build the Boulder Dam.
Date: 1935
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Hand-drawn sketch map of Land-Los Angeles boundaries. Volume 2, page 175.
Date: 1839
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Caption: "Liberty Bell," on display in the Pennsylvania State Building at the Panama-Pacific International Exposition, after its 3,000 mile journey from Philadelphia, Pennsylvania.
Date: 1915