Grocke, D., Hesselbo, S., & Jenkyns, H. (1999). Carbon-isotope composition of Lower Cretaceous fossil wood: Ocean-atmosphere chemistry and relation to sea-level change.
Lua i Stíl Chicago (17ú heag.)Grocke, DR, S. Hesselbo, agus H. Jenkyns. Carbon-isotope Composition of Lower Cretaceous Fossil Wood: Ocean-atmosphere Chemistry and Relation to Sea-level Change. 1999.
Lua MLA (9ú heag.)Grocke, DR, et al. Carbon-isotope Composition of Lower Cretaceous Fossil Wood: Ocean-atmosphere Chemistry and Relation to Sea-level Change. 1999.
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