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)

Eurypterids of the Devonian Holland Quarry shale of Ohio / Erik N. Kjellesvig-Waering --

v.14:no.5(1961)

The stratigraphy of the Devonian Holland Quarry shale of Ohio / J. Ernest Carman --

v.14:no.1(1960)