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Nitrogen and soil organic matter proceedings of a conference organized by the soil scientists of the National Agriculture Advisory Service, October 22nd-23rd 1964
- "Conference papers and proceedings"@en
- "Conference papers and proceedings"
- "Nitrogen and soil organic matter proceedings of a conference organized by the soil scientists of the National Agriculture Advisory Service, October 22nd-23rd 1964"@en
- "Nitrogen and soil organic matter: proceedings of a conference organized by the soil scientists of the National Agriculture Advisory Service, October 22nd-23rd 1964"