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1
土法干节烟煤制氮肥

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Corporate Authors: 零陵县科学技术普及协会
Published: 湖南人民出版社
Publication Dates: 1958
Call Number: 466.6/1762
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2
土法制造外钙混合肥料

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Corporate Authors: 湖北省工业试验所
Published: 湖南人民出版社
Publication Dates: 1958
Call Number: 466.6/3401
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