The GreyLit Report: Understanding the Challenges of Finding Grey Literature

Searching for and finding grey literature can be difficult. Grey literature, by its nature, is not commercially published and as a result, it requires multiple search...检索与获取灰色文献（Grey Literature）往往颇具难度。灰色文献因其固有属性，并未进行商业出版，故而其检索工作往往需要多渠道开展……