Pre-Cambrian Igneous Rocks of the Unkar Terrane, Grand Canyon of the Colorado, ArizonaCharles D. Walcott, Joseph Paxson Idding · First published 1895 · Latest edition 2023Open the Tome
Cambrian Geology and PaleontologyCharles D. Walcott, Charles Elmer Resser · First published 1910 · Latest edition 2018Open the Tome
Classification of the Cambrian system of North AmericaCharles D. Walcott · First published 1987Open the Tome
Classification and terminology of the Cambrian BrachiopodaCharles D. Walcott · First published 1908Open the Tome
Nomenclature of some Cambrian cordilleran formationsCharles D. Walcott · First published 1908Open the Tome
Descriptive notes of new genera and species from the Lower Cambrian or Olenellus zone of North AmericaCharles D. Walcott · First published 1889Open the Tome
Second contribution to the studies on the Cambrian faunas of North AmericaCharles D. Walcott · First published 1886Open the Tome
The Utica slate and related formations of the same geological horizonCharles D. Walcott · First published 1879Open the Tome
