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  1. By: Maryland Geological Survey. - Abbe, Cleveland, - Bauer, L. A. (Louis Agricola), - Clark, William Bullock, - Dorsey, Clarence W. - Fassig, Oliver L. - Merriam, C. Hart (Clinton Hart), - Newell, Frederick Haynes, - O'Harra, Cleophas C. - Preble, Edward Alexander, - Sudworth, George B. (George Bishop),
    Publication info: Baltimore, Johns Hopkins Press, 1900
    Holding Institution: University of Toronto - Robarts Library
  2. By: Clark, William Bullock, - Twitchell, M. W. (Mayville William),
    Publication info: Washington, Govt. print. off, 1915
    Holding Institution: University of Connecticut Libraries
  3. By: Clark, William Bullock,
    Publication info: Washington, Govt. Print. Off, 1893
    Holding Institution: Smithsonian Libraries and Archives
  4. By: Clark, William Bullock, - Berry, Edward Wilber, - Miller, Benjamin L. - Watson, Thomas L. (Thomas Leonard),‏
    Publication info: Charlottesville, University of Virginia, 1912
    Holding Institution: Smithsonian Libraries and Archives
  5. By: Maryland Geological Survey. - Bassler, Ray S. (Ray Smith), - Berry, Edward Wilber, - Berry, Edward Wilber, - Clark, William Bullock, - Gardner, Julia Anna, - Goldman, Marcus I. - Pilsbry, Henry Augustus, - Stephenson, Lloyd William,
    Publication info: Baltimore, The Johns Hopkins press, 1916
    Holding Institution: University of California Libraries
  1. By: Clark, William Bullock,
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1890
    Publication Info: [1837-1896]
  2. By: Clark, William Bullock,
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1890-10-11
    Publication Info: [1837-1896]
  3. By: Clark, William Bullock,
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1890-10-14
    Publication Info: [1837-1896]
  4. By: Clark, William Bullock,
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1890-10-02
    Publication Info: [1837-1896]
  5. By: Clark, William Bullock,
    Type: Correspondence
    In: Asa Gray correspondence
    Date: 1890-10-07
    Publication Info: [1837-1896]