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APA Citation
Álvaro, J. J., Esteve, J., Gracia, F., & Zamora, S. (2019). cambrian trilobites from the Huérmeda Formation (Iberian Chains, north‐east Spain) and the inadequacy of the Marianian Stage. Papers in palaeontology, 5, 299–321. http://access.bl.uk/ark:/81055/vdc_100081487477.0x000004