Romer, A.S. (1925). Permian amphibian and reptilian remains described as Stephanospondylus. Journal of Geology. 33: 447—463. doi:10.1086/623210. JSTOR30060376.
Romer, A.S. (1925). Permian amphibian and reptilian remains described as Stephanospondylus. Journal of Geology. 33: 447—463. doi:10.1086/623210. JSTOR30060376.
Romer, A.S. (1925). Permian amphibian and reptilian remains described as Stephanospondylus. Journal of Geology. 33: 447—463. doi:10.1086/623210. JSTOR30060376.