Reference
Wayne M. Ahr, Robert J. Jr. Stanton (1994): Comparative Sedimentology and Paleontology of Waulsortian Mounds and Coeval Level-Bottom Sediments of the Lower Lake Valley Formation (Lower Mississippian) in the Sacramento Mountains (New Mexico, USA) – Abhandlungen der Geologischen Bundesanstalt in Wien – 50: 11 - 24.