Yamaoka, B. K. <br/><br/>
A national directory of 911 systems :  final report / 
by B.K. Yamaoka, T.J. Yung ; prepared for Bureau of Justice Statistics, U.S. Department of Justice. 
 - Washington, D.C. :  The Bureau,  1980. 
 - v, 626 p. ;  28 cm. 
<br/><br/> "Center for Systems Development, SRI International."  "September 1980." 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public safety radio service--Directories.--United States<br/>Emergency communication systems--Directories.--United States
<br/><br/><label>Dewey Class. No.: </label>384.6