Vol. s5-10, Issue 59, 1925November 01, 1925 EDT
The Anaspida and the Problem of the Origin of the Vertebrates
The Anaspida and the Problem of the Origin of the Vertebrates
Percy Edward Raymond,
Raymond, P. E. (1925). The Anaspida and the Problem of the Origin of the Vertebrates. American Journal of Science, s5-10(59), 433–436. https://doi.org/10.2475/ajs.s5-10.59.433