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  1. By: Ewell, Ervin Edgar,
    Publication info: Washington, Govt. print. off, 1898
    Holding Institution: Library of Congress
  2. By: Ewell, Ervin Edgar,
    Publication info: Washington, Govt. print. off, 1903
    Holding Institution: University of California Libraries
  3. By: Ewell, Ervin Edgar, - Bigelow, Willard Dell, - Page, Logan Waller,
    Publication info: Washington, Govt. print. off, 1901
    Holding Institution: University of California Libraries
  4. By: Spencer, Guilford L. (Guilford Lawson), - Ewell, Ervin Edgar, - United States. Division of Chemistry.
    Publication info: Washington, D.C, G.P.O, 1892
    Holding Institution: Multiple institutions