Walls, J. (1982). Combating desertification in China: A report on a seminar sponsored by the Academy of Sciences of the People's Republic of China and the United Nations Environment Programme. Nairobi: UNEP.
Παραπομπή Chicago StyleWalls, James. Combating Desertification in China: A Report On a Seminar Sponsored By the Academy of Sciences of the People's Republic of China and the United Nations Environment Programme. Nairobi: UNEP, 1982.
Παραπομπή MLAWalls, James. Combating Desertification in China: A Report On a Seminar Sponsored By the Academy of Sciences of the People's Republic of China and the United Nations Environment Programme. Nairobi: UNEP, 1982.
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