new combination referenceStevens, C. H.; Stone, P. (2007). The Pennsylvanian–Early Permian Bird Spring Carbonate Shelf, Southeastern California: Fusulinid Biostratigraphy, Paleogeographic Evolution, and Tectonic Implications. <em>Geological Society of America Special Paper.</em> 429: 1-82., available online athttps://doi.org/10.1130/2007.2429[details] Available for editors [request]