Cite
MLA Citation
Frederick A. Sundberg and Mark Webster. “"Ptychoparioid" trilobites of the Harkless Formation and Mule Spring Limestone (Cambrian Series 2, Stage 4), Clayton Ridge, Nevada.” Journal of paleontology, vol. 96, 2022, pp. 886–920. http://access.bl.uk/ark:/81055/vdc_100158009264.0x00004d