Hessland, I. (1949a) Investigations of the Lower Ordovician of the Siljan District, Sweden. I. Lower Ordovician ostracods of the Siljan District, Sweden. Bulletin of the Geological Institutions of the University of Uppsala 33, 97–408.
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Hesslandistrict, I. D.; Swedenower, I. L.
1949
Investigations of the Lower Ordovician of the Siljan Ordovician ostracods of the Siljan District, Sweden
Bulletin of the Geological Institutions of the University of Uppsala