Swanberg and Bjørklund 1987Swanberg, N.R. and Bjørklund, K.R., 1987. Radiolaria in the plankton of some fjords in western and northern Norway: The distribution of species. Sarsia, vol. 72: 231-244.
Many thanks to Kjell R. Bjørklund for scanning the original plate. The plate is prepared for web by Jane K. Dolven.