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1. Organic agriculture: economic and ecological comparison with conventional methods

by Oelhaf R C | [Author].

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: New Jersey ; Allenheld Osmun and Co Publishers ; 1978Availability: Items available for loan: College of Agriculture, Vellanikkara [Call number: 338 .1 OEL/OR] (1).

2. Organic agriculture: economic and ecological comparison with conventional methods

by Oelhaf R C | [Author].

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: New Jersey ; Allanheld Osmun and Co Publishers ; 1978Availability: Items available for loan: College of Agriculture, Vellanikkara [Call number: 338 .1 OEL/OR] (1).

3. Organic agriculture: economic and ecological comparison with conventional methods

by Oelhaf R C | [Author].

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: New Jersey ; alleheld Osmun ands Co Publishers ; 1978Availability: Items available for loan: College of Agriculture, Vellanikkara [Call number: 338 .1 OEL/OR] (1).

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