FAO. (1989). FAO conservation guide N.21: Role of forestry in combating desertification. Rome: FAO.
Trích dẫn kiểu ChicagoFAO. FAO Conservation Guide N.21: Role of Forestry in Combating Desertification. Rome: FAO, 1989.
MLA CitationFAO. FAO Conservation Guide N.21: Role of Forestry in Combating Desertification. Rome: FAO, 1989.
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