A cycadophyte from the North American coal measures

• 1 July 1916
• journal article
• Published by American Journal of Science (AJS) in American Journal of Science
• Vol. s4-42  (247) , 21-26
• https://doi.org/10.2475/ajs.s4-42.247.21

Abstract

Keywords

• CYCADOPHYTE
• NORTH AMERICAN COAL
• AMERICAN COAL MEASURES