Contract No. 51, East Branch Baffle, Site of Quabbin Reservoir, Greenwich, Hardwick, quarry tunnel and type of dynamite used, east branch baffle, Hardwick, Mass., Sep. 16, 1936

Contract No. 51, East Branch Baffle, Site of Quabbin Reservoir, Greenwich, Hardwick, quarry tunnel and type of dynamite used, east branch baffle, Hardwick, Mass., Sep. 16, 1936

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