Canadian Fossils [microform]E. (Elkanah) 1820-1876 Billings, Geological Survey of Canada · First published 2021Open the Tome
Devonian Fossils of Canada West [microform]E. (Elkanah) 1820-1876 Billings, Geological Survey of Canada · First published 2021Open the Tome
Figures and Descriptions on Canadian Organic RemainsGeological Survey of Canada, John William Salter, James Hall, Elkanah Billings, Thomas Rupert Jones, John Vaughan Thompson · First published 1865Open the Tome
Palaeozoic FossilsJoseph Frederick Whiteaves, Elkanah Billings, Geological Survey of Canada · First published 1865Open the Tome
![Cover of Canadian Fossils [microform]](https://covers.openlibrary.org/b/isbn/1014485630-M.jpg?default=false)
![Cover of Devonian Fossils of Canada West [microform]](https://covers.openlibrary.org/b/isbn/9781013519963-M.jpg?default=false)
