@incollection{gledocs_11858_00-1735-0000-0001-33AC-0,
author = {Reitner, Joachim},
editor = {Schmid, Friedrich and Späth, Christian},
title = {Erster Nachweis eines Rudisten (Durania mortoni (Mantell 1833)) aus der Mittelkreide von Helgoland},
booktitle = {Die Kreide der Nordseeinsel Helgoland},
year = {1991},
publisher = {Schweizerbart, Stuttgart},

note = { \url {http://hdl.handle.net/11858/00-1735-0000-0001-33AC-0}},
}