The scientific ideas of G.K. Gilbert : an assessment on the occasion of the centennial of the United States Geological Survey (1879-1979) / edited by Ellis L. Yochelson.

Charles Doolittle Walcott, paleontologist / Ellis L. Yochelson.

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Ellis L. Yochelson

Works from the collections

The scientific ideas of G.K. Gilbert : an assessment on the occasion of the centennial of the United States Geological Survey (1879-1979) / edited by Ellis L. Yochelson.

Charles Doolittle Walcott, paleontologist / Ellis L. Yochelson.