CLEVE-EULER, Astrid 1953 (Dec. 30 printed) Die Diatomeen von Schweden und Finnland. III. Monoraphideae, Biraphideae 1. K. Svenska VetAkad Handl. ser. 4 [i.e.6], 4{5}. 254 pp., figs. 484-979a on 41 unnumbered pls. incompletely processed