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Lua i Stíl Chicago (17ú heag.)Landman, N., W. Kennedy, W. Cobban, agus N. Larson. SCAPHITES OF THE "NODOSUS GROUP" FROM THE UPPER CRETACEOUS (CAMPANIAN) OF THE WESTERN INTERIOR OF NORTH AMERICA. 2010.
Lua MLA (9ú heag.)Landman, N., et al. SCAPHITES OF THE "NODOSUS GROUP" FROM THE UPPER CRETACEOUS (CAMPANIAN) OF THE WESTERN INTERIOR OF NORTH AMERICA. 2010.
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