American Diceratheres; Vol. 7 No. 6O. A. (Olof August) 1865- Peterson, Carnegie Museum · First published 2021Open the Tome
New Suilline Remains from the Miocene of Nebraska; Vol. 2 No. 8O. A. (Olof August) 1865- Peterson, Carnegie Museum · First published 2021Open the Tome
Revision of the Entelodontidae; Vol. 4 No. 3O. A. (Olof August) 1865- Peterson, Carnegie Museum · First published 2021Open the Tome
