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1
Annual report of the Board of Regents of the Smithsonian Institution, showing the operations, expenditures, and condition of the Institution for the year ending June 30, 1890. Repo...
Published 1891Online Access
Government Document Electronic eBook -
2
Sodium sulphate: Its sources and uses, by Roger C. Wells. [U.S. Geological Survey Bulletin 717.].
Published 1921Online Access
Government Document Electronic eBook