TY  - BOOK
AU  - Cassell, Kay Ann
TI  - Reference and information services in the 21st century : an introduction
U1  - Res. 025.524 C344r 2009 
KW  - 1. Reference services (Libraries).
KW  - 2. Electronic reference services (Libraries).
KW  - 3. Reference books-Bibliography.
KW  - 4. Electronic reference services-Directories
N1  - Includes bibliographical references and index

ER  -