Supplement to the National Death Index User's Manual  NDI Plus :coded causes of death 
 NDI: coded causes of death. 
US Department of Health and Human Services. 
 - Revised July 23, 1999. 
 - Maryland  National Center for Health Statistics  1999. 
 - 1v. (various pagings)  ill.  28cm. 
<br/><br/> Cover title " National Death Index Plus ". 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Death--Proof an certification--Data procesing--Handbooks, manuals, etc.--United States<br/>Registers of births, etc.--Data procesing--Handbooks, manuals, etc.--United States