JANSSEN, ARIE W., Naturalis Biodiversity Center, P.O. Box 9517, NL-2300 RA Leiden, The Netherlands.

• Zootaxa Vol. 4782 No. 1: 27 May 2020 - Monograph
  Paleogene and Late Cretaceous Pteropoda (Mollusca, Gastropoda, Heterobranchia) from North America
  Abstract