Internet in library reference services 19 Electronic reference services (Libraries) 7 Computer network resources 6 Internet searching 6 Reference services (Libraries) 6 Evaluation 4 Information resources 3 Reference books 3 Directories 2 Google 2 Libraries and the Internet 2 Plugs-in (Computer programs) 2 Web 2.0 2 Web search engines 2 Academic libraries 1 Electronic reference sources 1 Information technology 1 Libraries and the internet 1 Reference services 1 Scholarly Web sites 1