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  1. 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
  2. By: Spencer, Guilford L. (Guilford Lawson),
    Publication info: Washington, Govt. print. off, 1894
    Holding Institution: University of California Libraries
  3. By: Wiley, Harvey Washington, - Spencer, Guilford L. (Guilford Lawson), - Denton, Albert Augustus. - Thompson, Wibray J.
    Publication info: Washington, Govt. Print. Off, 1892
    Holding Institution: University of California Libraries
  4. By: Spencer, Guilford L. (Guilford Lawson),
    Publication info: Washington, Govt. Print. Off, 1887
    Holding Institution: University of California Libraries