Hanna, G. D. (1927). The lowest known Tertiary diatoms in California. <em>Journal of Paleontology.</em> 1(2): 103-127. page(s): p. 113; pl. 18, fig. 6-7 [details]
Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2025). DiatomBase. Entopyla frickei Hanna, 1927. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=637613 on 2025-06-01
original descriptionHanna, G. D. (1927). The lowest known Tertiary diatoms in California. <em>Journal of Paleontology.</em> 1(2): 103-127. page(s): p. 113; pl. 18, fig. 6-7 [details]