Information retrieval :   implementing and evaluating search engines/ 
Büttcher, Stefan; Clarke, Charles L. A., ; Cormack, Gordon V. 
 - London:  MIT Press,  2010. 
<br/><br/><label>ISBN: </label>9780262528870 
<br/><br/><label>Dewey Class. No.: </label>025.524  / INF