HAMMERSBURG, Sean Robert; HASIOTIS, Stephen T.; ROBISON, Richard A. Ichnotaxonomy of the Cambrian Spence Shale Member of the Langston Formation, Wellsville Mountains, Northern Utah, USA. Paleontological Contributions, [S. l.], n. 20, p. 1–66, 2018. DOI: 10.17161/1808.26428. Disponível em: https://journals.ku.edu/paleocontributions/article/view/20296.. Acesso em: 3 may. 2024.