Reference librarians -- 2 Study and teaching 2 Case studies 1 Case studies -- 1 Effect of technological innovations on 1 Elctronic reference services (Libraries) -- 1 Electronic reference services (Libraries) 1 Electronic reference services (Libraries) -- 1 Electronic reference services(Libraries) -- 1 Information technology 1 Reference services (Libraries) -- 1 Study and teaching -- 1 Training of 1 Washington(State) -- 1