The classification of some British soils according to the Comprehensive System of the United States: J.M. Ragg and B. Clayden. Soil Survey Technical Monograph No. 3. Rothamsted Experimental Station,Harpenden, 1973, 227 pp., £1.20 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

The classification of some British soils according to the Comprehensive System of the United States: J.M. Ragg and B. Clayden. Soil Survey Technical Monograph No. 3. Rothamsted Experimental Station,Harpenden, 1973, 227 pp., £1.20

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