A. R. Crook

Elephas primigenius boreus, Ha

Elephas primigenius boreus, Hay at Golconda, Illinois

1927

Illinois state museum, 1877-19

Illinois state museum, 1877-1927

1927

The origin of the Cahokia mounds

1922

Illinois State Museum of Natur

Illinois State Museum of Natural History

1914

Geology of Sangamon County

1912

A history of the Illinois state museum of natural history

1907

The mineralogy of the Chicago area

1902

The lithographic stone quarrie

The lithographic stone quarries of Bavaria, Germany

1894