Minas Gerais Brazil

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Peculiar modes of occurrence of gold in Brazil
O. A. Derby

American Journal of Science December 1884, s3-28 (168) 440-447; DOI: https://doi.org/10.2475/ajs.s3-28.168.440
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On the flexibility of itacolumite
O. A. Derby

American Journal of Science September 1884, s3-28 (165) 203-205; DOI: https://doi.org/10.2475/ajs.s3-28.165.203
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Modes of occurrence of the diamond in Brazil
Orville A. Derby

American Journal of Science July 1882, s3-24 (139) 34-42; DOI: https://doi.org/10.2475/ajs.s3-24.139.34
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On the gold-bearing rocks of the province of Minas Geraes, Brazil
O. A. Derby

American Journal of Science March 1882, s3-23 (135) 178; DOI: https://doi.org/10.2475/ajs.s3-23.135.178
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Geology of the diamond
O. A. Derby

American Journal of Science February 1882, s3-23 (134) 97-99; DOI: https://doi.org/10.2475/ajs.s3-23.134.97
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The Geological Survey of Brazil; first preliminary report made to the counsellor Thomaz Jose Coelho de Almeida, Minister and Secretary of State for Agriculture, etc
C. F. Hartt

American Journal of Science June 1876, s3-11 (66) 466-473; DOI: https://doi.org/10.2475/ajs.s3-11.66.466

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