Não informado. (2008). Ringyo Shikenjo kenkyu hokoku. Government Forest Experiment Station.
Lua i Stíl Chicago (17ú heag.)Não informado. Ringyo Shikenjo Kenkyu Hokoku. Ibaraki, Japão: Government Forest Experiment Station, 2008.
Lua MLA (8ú heag.)Não informado. Ringyo Shikenjo Kenkyu Hokoku. Government Forest Experiment Station, 2008.
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