Mass casualty shootings. 
Title from publications home page:  Crime and victimization fact sheets 

 - 1 online resource (2 unnumbered pages) :  color illustrations 
<br/><br/> "The National Center for Victims of Crime in partnership with the Office for Victims of Crime."  Publication date taken from publications home page.  CRDP Project record. 
<br/><br/>Includes bibliographical references (page [2]). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass casualties--United States--Statistics.<br/>Firearms and crime--United States--Statistics.
<br/><br/><label>GPO Item No.: </label>0720-B (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>J 34.2:SH 7