Azmy, Karem Supplemental material: Oxygen and Carbon Isotopic Composition of Silurian Brachiopods: Implications for Coeval Seawater and Glaciations GSA Data Repository Item 9880, GSA Bulletin, Vol. 110, p. 1499. File size: 8 p., about 228 K bytes. Geoscience 1998-01-01
    https://gsapubs.figshare.com/articles/journal_contribution/Supplemental_material_Oxygen_and_Carbon_Isotopic_Composition_of_Silurian_Brachiopods_Implications_for_Coeval_Seawater_and_Glaciations/12334715
10.1130/9880