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Journal Article
Becker, Ralph Thomas, Klug, Christian, Soete, Till, Hartenfels, Sven 
ORCID: 0000-0002-2243-2096, Aboussalam, Zhor Sarah and El Hassani, Ahmed
(2019).
The oldest ammonoids of Morocco (Tafilalt, lower Emsian).
Swiss J. Palaeontol., 138 (1).
S. 9 - 26.
HEIDELBERG:
SPRINGER HEIDELBERG.
ISSN 1664-2384
Hartenfels, Sven ORCID: 0000-0002-2243-2096, Becker, Ralph Thomas, Herbig, Hans-Georg ORCID: 0000-0002-8878-8378, Qie, Wenkun, Kumpan, Tomas ORCID: 0000-0002-7795-8319, De Vleeschouwer, David ORCID: 0000-0002-3323-807X, Weyer, Dieter and Kalvoda, Jiri
(2022).
The Devonian-Carboniferous transition at Borkewehr near Wocklum (northern Rhenish Massif, Germany) - a potential GSSP section.
Palaeobiodiversity Palaeoenvironments, 102 (3).
S. 763 - 830.
HEIDELBERG:
SPRINGER HEIDELBERG.
ISSN 1867-1608
Stichling, Soeren, Becker, Ralph Thomas, Hartenfels, Sven ORCID: 0000-0002-2243-2096, Aboussalam, Zhor Sarah and May, Andreas ORCID: 0000-0002-6714-3925
(2022).
Drowning, extinction, and subsequent facies development of the Devonian Honne Valley Reef (northern Rhenish Massif, Germany).
Palaeobiodiversity Palaeoenvironments, 102 (3).
S. 629 - 697.
HEIDELBERG:
SPRINGER HEIDELBERG.
ISSN 1867-1608