Category:Scientific articles mentioning the Hartfell Shale

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Media in category "Scientific articles mentioning the Hartfell Shale"

The following 2 files are in this category, out of 2 total.

Annual report (IA annualreport6131907newy).pdf 1,262 × 1,718, 674 pages; 39.59 MB
Graptolites of New York (IA cu31924004415380).pdf 952 × 1,537, 664 pages; 21.29 MB

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