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Directory Results for Diatom 25: 153156 Kazuhiro Akaneya, Tsuyoshi Watanabe, Shohei Takano and Noboru Katano : Are water quality indices based on epipelic diatoms applicableA case study of Toyokawa River, Akita, Japan Abstract Three diatom indices, Diatom - - - to Diatom 25: 157159 Toshio Iijima: Diatom assemblages in the moat around Takashima Castle, Suwa City, Nagano Prefecture Abstract The diatom flora in the moat around Takashima Castle, Suwa City, Nagano Prefecture, was studied in January 2009 -