Merkoša sitáhtat

APA-čujuhus (7. p.)
Pärnaste, H., Toom, U., & Popov, L. E. (2023). The earliest Ordovician trace fossils Cruziana and Rusophycus from Baltica. Estonian Academy Publishers.
Chicago-čujuhus (17. p.)
Pärnaste, Helje, Ursula Toom, juo Leonid E. Popov. The Earliest Ordovician Trace Fossils Cruziana and Rusophycus from Baltica. Estonian Academy Publishers, 2023.
MLA-čujuhus (9. p.)
Pärnaste, Helje, et al. The Earliest Ordovician Trace Fossils Cruziana and Rusophycus from Baltica. Estonian Academy Publishers, 2023.
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