Økland, K.A.; Økland, J. 1989. The amphiatlantic freshwater sponge Anheteromeyenia ryderi (Porifera: Spongillidae): taxonomic-geographic implications of records from Norway. Hydrobiologia 171: 177-188.
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Økland, K. A.; Økland, J.
1989
The amphiatlantic freshwater sponge Anheteromeyenia ryderi (Porifera: Spongillidae): taxonomic-geographic implications of records from Norway