Sampath, K. <br/><br/>Introduction to educational technology / K. Sampath, A. Pannirselvam, and S. Santhanam.   -- 4th ed.   -- New Delhi, India:  Sterling Publisher Private Ltd.,  2004. <br/>xi,367 p.:  ill.;  22 cm. <br/><br/> Includes index.  <br/><br/><label>ISBN: </label>9788120731394 <br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology.<br/><br/><label>Dewey Class. No.: </label>Res 317.33 Sa473 2004