s 灰色文献（Grey Literature）是当前经济、工程技术、自然科学以及社会诸多领域中最新科研成果和最新动态的情报信息，它包括学位 论文、科技报告、研究报告、内...
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Grey literature indexes 灰色文献索引
foreign grey literature 国外灰色文献
chinese and foreign grey literature 国外灰色文献
the Internet Grey literature 网上灰色文献的获取
grey-literature 灰色文献
S&T grey literature 科技灰色文献
Grey Literature Network Service 灰色文献资讯网服务中心
Grey literature is a kind of important and valuable information recourse.
灰色文献是一种具有重要情报价值的信息源。
The most common types of grey literature were abstracts (55%) and unpublished data (30%).
灰色文献最常见的型式为摘要(55%)及未出版的资料(30%)。
To review systematically research studies, which have investigated the impact of grey literature in meta-analyses of randomized trials of health care interventions.
凡探索灰色文献对随机临床试验统合分析结果之影响的相关研究，收集并进行系统性的回顾。
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