Distribution Department, Northern High Service Middlesex Fells Reservoir, profiles on center line of core walls and division walls, Sheet 2, Acc. No. B1193 (engineering plan), Mass., Mar. 1898
Distribution Department, Northern High Service Middlesex Fells Reservoir, profiles on center line of core walls and division walls, Sheet 2, Acc. No. B1193 (engineering plan), Mass., Mar. 1898
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Distribution Department, Northern High Service Middlesex Fells Reservoir, profiles on center line of core walls and division walls, Sheet 2, Acc. No. B1193 (engineering plan), Mass., Mar. 1898