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Holm, 1892 — Om mynningen hos Lituites. Sveriges Geologiska Undersokning. Ser. 

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Holm, 1892 — Om tvenne Gyroceras-formigt bojda Endoceras — arter. Sveriges Geol- 

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Holm, 1895 — Om de endosifonala bildrtingarna hos familjen Endoceratidae. Sver. Geol. 

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