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美国学者WehgaHd在对公共图书馆的实证研究中将信息用户价值划分为4个层次:基本价值、期望价值、需求价值和未预期价值。公共图书馆的基本价值是收藏各种类型的信息资源供读者使用;期望价值是公共图书馆内有可以提供信息需求帮助的馆员和整洁安静的学习环境;需求价值是本馆没有的资料可以通过公共图书馆的服务,如馆际互借、文献传递、网络检索、
American scholar WehgaHd in the empirical study of public libraries will be divided into four levels of information user value: basic value, expected value, demand value and unexpected value. The basic value of public libraries is to collect various types of information resources for readers to use; the expected value is the public library can provide information to help librarians and neat and quiet learning environment; demand value is the museum does not have the information can Through the public library services, such as interlibrary loan, document delivery, web search,