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- AGRIS6
- Africa1
- Agricola4
- Agricultural On-Line Access (Agricola)1
- Belgium1
- Commonwealth Agricultural Bureaux (CAB)[remove]19
- England1
- Food and Agriculture Organization (FAO)1
- Hungary1
- International System for Agricultural Sciences and Technology (ISSNT)1
- National Agricultural Library (NAL)2
- Scotland1
- USSR1
- United Nations1
- adoption1
- advisory services1
- agricultural development2
- agriculture research1
- archives1
- barriers1