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By: Spencer, Guilford L. (Guilford Lawson), - Ewell, Ervin Edgar, - United States. Division of Chemistry.Edition:Publication info: Washington, D.C, G.P.O, 1892Volume:Series:Holding Institution: Multiple institutionsSubjects:BHL Collections:
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By: Ewell, Ervin Edgar,Edition:Publication info: Washington, Govt. print. off, 1898Volume:Series:Holding Institution: Library of CongressSubjects:BHL Collections:
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By: Ewell, Ervin Edgar, - Bigelow, Willard Dell, - Page, Logan Waller,Edition:Publication info: Washington, Govt. print. off, 1901Volume:Series:Holding Institution: University of California LibrariesSubjects:BHL Collections:
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By: Ewell, Ervin Edgar,Edition:Publication info: Washington, Govt. print. off, 1903Volume:Series:Holding Institution: University of California LibrariesSubjects:BHL Collections: