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  1. Asa Gray correspondence. Senders Wi-Wy,
    By: Gray, Asa, - Wilcox, Thomas Erastus, - Williams, S. Wells (Samuel Wells), - Williamson, William Crawford, - Winsor, Justin, - Winthrop, Robert C. (Robert Charles), - Woolson, George C., - Wright, Albert A. (Albert Allen), - Wright, G. Frederick (George Frederick), - Wright, Samuel Hart, - Wright, William Greenwood, - Wiley & Putnam,
    Contributed by: Harvard University Botany Libraries
    BHL Collections: Harvard University Herbarium, Botany Libraries
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  2. History of infusoria, including the desmidiaceae and diatomaceae, British and foreign /
    By: Pritchard, Andrew, - Archer, William, - Arlidge, J. T. - Ralfs, John, - Williamson, William Crawford, - Royal College of Physicians of London.
    Edition: Fourth edition. Enlarged and revised by J. T. Arlidge; W. Archer; J. Rafts; W. C. Williamson; and the author.
    Publication info: London :Whitaker and Co.,1861.
    Contributed by: Royal College of Physicians, London (archive.org)
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  3. A history of Infusoria, including the Dismidiace and Diatomace, British and foreign. By Andrew Pritchard ...
    By: Pritchard, Andrew, - Archer, William, - Arlidge, J. T. - Ralfs, John - Williamson, William Crawford,
    Edition: 4th ed. Enl. and rev. by J. T. Arlidge ... W. Archer ... J. Ralfs ... W. C. Williamson ... and the author ...
    Publication info: London,Whitaker and co.,1861.
    Contributed by: MBLWHOI Library
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  4. On the organization of the fossil plants of the coal-measures. Further observations on the organization of the fossil plants of the coal-measures.
    By: Williamson, William Crawford,
    Publication info: London,1894-96
    Contributed by: Cornell University Library
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  5. Reminiscences of a Yorkshire naturalist / by the late William Crawford Williamson ; edited by his wife.
    By: Williamson, William Crawford,
    Publication info: London :George Redway,1896.
    Contributed by: University of California Libraries (archive.org)
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