Não informado. (1950). Tohoku Shikenjo Kenkyu Hokoku. Tohoku National Agricultural Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Tohoku Shikenjo Kenkyu Hokoku. Tohoku, Japão: Tohoku National Agricultural Experiment Station, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Tohoku Shikenjo Kenkyu Hokoku. Tohoku National Agricultural Experiment Station, 1950.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.