P-ISSN 0002-9599
E-ISSN 1945-452X
Vol. s4-43, Issue 255, 1917March 01, 1917 EDT
Beecher’s Classification of Trilobites, After Twenty Years
Beecher’s Classification of Trilobites, After Twenty Years
Percy Edward Raymond,
Raymond, P. E. (1917). Beecher’s Classification of Trilobites, After Twenty Years. American Journal of Science, s4-43(255), 196–210. https://doi.org/10.2475/ajs.s4-43.255.196