Hedström H. (1923). On Discinella holsti Mbg. and Scapha antiquissima (Markl.) of the division Patellacea. Sveriges Geologiska Undersökning, ser. C. 313: 1-13.
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Hedström H.
1923
On Discinella holsti Mbg. and Scapha antiquissima (Markl.) of the division Patellacea