Vidal, Gonzalo, 1990, The late Proterozoic acritarch Chuaria circularis (Walcott) Vidal and Ford: Journal of Paleontology, v. 64, p. 488.
Journal of Paleontology, v. 64, p. 488.
Biostratigraphy, Correlation, Microfossil, Chuar Group - Grand Canyon Supergroup - Late Proterozoic,