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  1. By: Nichols, Henry W. (Henry Windsor), - Field Museum of Natural History. Department of Geology.
    Publication info: Chicago, Field Museum of Natural History, 1929
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Cement  Cement (bouwkunde)
  2. By: Eckel, Edwin Clarence, - Smith, Eugene Allen,
    Publication info: Montgomery, Brown printing company, 1904
    Holding Institution: University of California Libraries
    Subjects: Alabama  Cement  Portland cement