Beecher's classification of trilobites, after twenty years

• 1 March 1917
• journal article
• Published by American Journal of Science (AJS) in American Journal of Science
• Vol. s4-43  (255) , 196-210
• https://doi.org/10.2475/ajs.s4-43.255.196

Abstract

Keywords

• TWENTY YEARS
• BEECHER'S CLASSIFICATION OF TRILOBITES