Technology of concrete when pozzolans, slags and chemical admixtures are used

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Report of the Secretary of War: being part of the message and documents communicated to two houses of Congress at the beginning of the secondd session of the forty-sixth Congress.

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Message from the President of the United States to the two Houses of Congress: at the commencement of the first session of the Thirty-ninth Congress, with the reports of the heads of departments and selections from accompanying documents

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