HDR, <br/><br/>
HANDBOOK OF PUBLIC SYSTEM / 
HDR. 
 - 2nd ED. 
 -  WILEY SON,  2001. 
 - 1136 P. ; 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>551.48  / HDR