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渡辺 光昭, 早瀬 達郎. "46. 重縮合りん酸塩に関する研究(第3報) : メタりん酸苦土の肥効について(関東支部講演会講演要旨)." Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 11.0 (1965) A17