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1.
Chemicals humus, and the soil / Donald P. Hopkins by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: London : Faber and Faber, 1945
Availability: Items available for loan: National Library of India (1)Call number: 134 C 373.

2.
Chemicals humus and the soil: a simple presentation of contemporary knowledge and opinions about fertilizers manures and soil fertility/ Donald P. Hopkins by
Material type: Text Text; Format: print ; Literary form: Not fiction
Language: English
Publication details: London: Faber and Faber, 1956
Availability: Items available for loan: National Library of India (1)Call number: E 631.8 H 774.

                                                                           
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