Polychaeta Errantia of the Siboga Expedition. Part Ii Aphroditidae and ChrysopetalidaePublished in Siboga expeditie, in 1917, in volume 24, issue 1b, pages 46-143Die Gattung Astropecten und ihre StammesgeschichtePublished in Siboga expeditie, in 1917, in volume 46a, pages 1-191
Die Gattung Astropecten und ihre StammesgeschichtePublished in Siboga expeditie, in 1917, in volume 46a, pages 1-191