改善发展中国家植被繁殖作物种子系统的监管选择
Regulatory options to improve seed systems for vegetatively propagated crops in developing countries
【作者】 David J. Spielman ; Marcel Gatto ; Tesfamicheal Wossen ; Margaret McEwan ; Tahirou Abdoulaye ; Mywish K. Maredia ; Guy Hareau
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