Reference services (Libraries) 17 Reference service 11 Reference services 11 Information services 5 Library Laws-- University Library-- Library Management-- Classification-- Cataloguing-- Reference Service-- Book Selection 5 Library Science 5 Reference Services 4 Electronic reference services (Libraries) 3 Reference Service 3 Reference Service-- Information Service-- Sources of Information-- User Education 3 Academic libraries 2 Cataloging 2 Classification-Books 2 College libraries 2 Electronic reference services 2 Information resources 2 Internet in library reference services 2 Library and Information Science 2 Library science 2 Medical libraries 2 Ready reference service 2 Reference books 2 Reference books-bibliography 2 Reference sources 2 United States 2 reference service 2 Abstracting and indexing services 1 Administration 1 Bibliography 1 Case studies 1