Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, arch forms for tunnel lining at Shaft 11, Quabbin Aqueduct, Hardwick, Mass., Nov. 9, 1933

Contract No. 20, Coldbrook-Swift Tunnel, Barre, Hardwick, Greenwich, arch forms for tunnel lining at Shaft 11, Quabbin Aqueduct, Hardwick, Mass., Nov. 9, 1933

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