The Ohio journal of science.

v. 20 (1919-1920)

The Ohio journal of science.

v. 21 (1920-1921)

The Ohio journal of science.

v. 19 (1918-1919)

The Ohio journal of science.

v. 18 (1917-1918)

Bulletin / Ohio Biological Survey.

1

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)

The reptiles of Ohio.

no.5