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  1. By: Long, Harold C. (Harold Cecil), - Percival, John,
    Publication info: New York, Frederick A. Stokes, 1910
    Holding Institution: University of California Libraries
  2. By: Percival, John,
    Edition: 4th ed.
    Publication info: New York, H. Holt, 1910
    Holding Institution: Cornell University Library
  3. By: Percival, John,
    Publication info: London, Duckworth and co, [1921]
    Holding Institution: University of California Libraries