United nations. (1990). Desertification control bulletin: A Bulletin of world events in the control of desertification, restoration of degraded lands and reforestation. UN.
Чикаго маягийн жагсаалтUnited nations. Desertification Control Bulletin: A Bulletin of World Events in the Control of Desertification, Restoration of Degraded Lands and Reforestation. Nairobi: UN, 1990.
MLA ишлэлUnited nations. Desertification Control Bulletin: A Bulletin of World Events in the Control of Desertification, Restoration of Degraded Lands and Reforestation. UN, 1990.
Warning: These citations may not always be 100% accurate.