FAO. (2004). Conservation of natural resources for sustainable agriculture: Training modules. Rome: Food and Agriculture Organization of the United Nations.
শিকাগো স্টাইলে সাইটেশনFAO. Conservation of Natural Resources for Sustainable Agriculture: Training Modules. Rome: Food and Agriculture Organization of the United Nations, 2004.
এমএলএ সাইটেশনFAO. Conservation of Natural Resources for Sustainable Agriculture: Training Modules. Rome: Food and Agriculture Organization of the United Nations, 2004.
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