Fossils from the Johnson Spring Formation, Middle Ordovician, Independence Quadrangle, California. Journal of Paleontology, 34 1960: 862-873. 864 [Zoological Record Volume 98]
Fossils from the Johnson Spring formation, Middle Ordovician, Independence Quad-rangle, California. Journal of Paleontology, 34 1960: 862-873. 864 [Zoological Record Volume 97]