TY - BOOK AU - Cassell Kay Ann AU - Hiremath Uma TI - Reference and information services in the 21st century: an introduction SN - 978-1-55570-672-2 U1 - 025.524 PY - 2009/// CY - New York PB - Neal-Schuman KW - Directories KW - Electronic reference services(Libraries) KW - Electronic reference sources KW - Reference books-bibliography KW - Reference services(Libraries) ER -