明清以来山东种植结构变迁及其影响研究：以美洲作物引种推广为中心：1368-1949

明清以来山东种植结构变迁及其影响研究：以美洲作物引种推广为中心：1368-1949

216 Pages · 2007 · 20.98 MB · Chinese
by 王宝卿
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“ Be grateful for whoever comes, because each has been sent as a guide from beyond. ” ― Rumi
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