Cassell, Kay Ann <br/><br/>Reference and information services in the 21st century:  an introduction/ Kay Ann Cassell and Uma Hiremath.--   -- London:  Facet Publishing.,  2011. <br/>xvii, 416 p.;  ill.  23 cm. <br/><br/> Includes bibliographical references and index. <br/><br/><label>ISBN: </label>978856047784 <br/><br/><label>Subjects--Topical Terms: </label><br/>References services (Libraries).<br/><br/><label>Dewey Class. No.: </label>Res 025.52422 C355 2011