?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=K&rft.au=Zhang%2C+K&rft.aulast=Zhang&rft.volume=411&rft.title=Precambrian+Research&rft.issn=0301-9268&rft.atitle=The+basal+Cambrian+carbon+isotope+excursion+revealed+in+the+Central+Iberian+Zone%2C+Spain&rft.date=1+September+2024&rft.genre=article