Ammonoid PaleobiologyChristian Klug, Dieter Korn, Kenneth De Baets, Isabelle Kruta, Royal H. Mapes · First published 2015Open the Tome
Cephalopods Present and PastNeil H. Landman, Richard Arnold Davis, Royal H. Mapes · First published 2008Open the Tome
Regional geology and paleontology of Upper Paleozoic Hamilton quarry area in southeastern KansasRoyal H. Mapes · First published 1988Open the Tome
Carboniferous and Permian Bactritoidea (Cephalopoda) in North AmericaRoyal H. Mapes · First published 1979Open the Tome
