Time factors of differentially preserved wood in two calcitic concretions in Pennsylvanian black shale from Indiana / Bertram G. Woodland -- and Catherine K. Richardson --.

v.33:no.10(1975)

Occurrence of Radiolaria in the Mississippian of Arkansas / [by] Catherine Nigrini -- and Matthew H. Nitecki --.

v.16:no.9(1968)