Catalog of the egan collection of silurian invertebrate fossils at the Chicago a
Ball, J.R., Greacen, K.F.
Catalog of the egan collection of silurian invertebrate fossils at the Chicago a - Chicago 1946 - 1-55 p. - Chicago Academy of Sciences. .
Catalog of the egan collection of silurian invertebrate fossils at the Chicago a - Chicago 1946 - 1-55 p. - Chicago Academy of Sciences. .