Corals from the Chouteau and Related Formations of the Mississippi Valley Region; Report of Investigations No. 97William H. (William Heyden) Easton · First published 2021Open the Tome
Carboniferous formations and faunas of central MontanaWilliam Heyden Easton · First published 1962Open the Tome
Corals from the Chouteau and related formations of the Mississippi Valley RegionWilliam Heyden Easton · First published 1944Open the Tome
