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    题名 作者 年代 出处 被引量
1Aboveground litterfall in Eurasian forests显示文摘With a data set of Eurasian forest litter fall based on 471 stands,annual litterfall was estimated to be 6.53Pg dm·a^-1 (1Pg=10^15g;dm,dry matter)in Eurasian forests,of which more than half occurred in tropical and subtropical forests,and a third in the boreal area.With litterfall,around 2.94Pg C per year is transferred from the forest vegetation to the soil on this continent.LIUChun-jiang Hannullvesniemi BjomBerg WemerKutsch YANGYu-sheng MAXiang-qing CarlJ.Westman 2003Journal of Forestry Research2003,14,1:34
2Oral mucosal changesand nicotine disposition in users of Swedish smokeless tobaccoproducts: A comparative study 显示文摘Andersson G Bjomberg G Curvall M 1994Journal of Oral Pathology &Medicine1994,23,:1
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