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Date: 1918 

Description: Front cover of a bulletin advertising the Model A general service tractor produced by the Worthington Pump and Machinery Corporation.

Date:  

Description: Pawling & Harnischfeger type "AN" crane with a type "A" trolley and a standard hook at Holthoff Machinery Co., Power & Mining Machine Co. There is a man in...

Date: 1954 

Description: Members of United Packinghouse Workers Local 40 signing a "Joe Must Go" petition to recall Wisconsin's Senator Joseph R. McCarthy.

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