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56 Šn/30-sep.
AHLBERG, Per
Ptychopariid trilobites in the Lower Cambrian of Scandinavia / Per Ahlberg. -- S.5-7 : 2 Figs. -- In: Geological Survey Open-File Report. -- 1981, No.81. -- separát. -- bibl.. -- Citováno jako: AHLBERG, Per Ptychopariid trilobites in the Lower... Geol. Surv. Open-File Report. 1981, No.81, S.5-7: 2 Figs.
Holmia kjerulfi Zone
Proampyx linnarssoni Zone
56
61835
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