Note on a new Permian xiphosuran from KansasCharles Emerson Beecher · First published 1904Open the Tome
Outline of natural classification of the TrilobitesCharles Emerson Beecher · First published 1897Open the Tome
The development of some Silurian BrachiopodaCharles Emerson Beecher · First published 1889Open the Tome
Ceratiocaridae from the upper Devonian Measures in Warren countyCharles Emerson Beecher · First published 1884Open the Tome
