What Does Graptolite Origination and Extinction Reveal about the Cause of the Late Ordovician Mass Extinction?Charles E. Mitchell, H. David Sheets, Michael J. Melchin, Chris Holmden · First published 2025Open the Tome
Geometric morphometrics for biologistsMiriam Zelditch, Donald Swiderski, David H Sheets, William Fink · First published 2004Open the Tome
