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structure

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    Notes on the microscopic structure of oolite, with analyses
    Erwin Hinckley Barbour and J. Torrey
    American Journal of Science September 1890, s3-40 (237) 246-249; DOI: https://doi.org/10.2475/ajs.s3-40.237.246
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    Notes on the internal and external structure of Paleozoic crinoids
    Charles Wachsmuth
    American Journal of Science August 1877, s3-14 (80) 115-127; DOI: https://doi.org/10.2475/ajs.s3-14.80.115
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    Types of orographic structure
    John Wesley Powell
    American Journal of Science December 1876, s3-12 (72) 414-428; DOI: https://doi.org/10.2475/ajs.s3-12.72.414
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    On the structure of [Obolella chromatica.
    Elkanah Billings
    American Journal of Science March 1876, s3-11 (63) 176-178; DOI: https://doi.org/10.2475/ajs.s3-11.63.176
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    On limonite with the color and translucency of goethite
    John William Mallet
    American Journal of Science June 1875, s3-9 (54) 460-461; DOI: https://doi.org/10.2475/ajs.s3-9.54.460
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    Note on the structure of the Blastoidea
    Elkanah Billings
    American Journal of Science May 1869, s2-47 (141) 353; DOI: https://doi.org/10.2475/ajs.s2-47.141.353

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