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Periodical

Study in Red.

Subjects: SPELEOTHEMS; HUMIC acid; FULVIC acids

  • Source: Scientific American; Aug2020, Vol. 323 Issue 2, p16-16, 1/3p, 1 Color Photograph

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Book

COAL.

  • Source: Earth Science: Earth Materials & Resources; 2012, p76-81, 6p

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