Wells, Bradley H. <br/><br/>
Data collection system :  National Dual Record and related system / 
H. Bradley Wella. 
 - Chapel Hill, N.C. :  University of North Carolina at Chapel Hill,  1974. 
 - 28 p. ;  25 cm. 
 - Scientific report series ;   no. 15 .
<br/><br/>Includes bibliographic references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population.<br/>Dual record systems.
<br/><br/><label>Dewey Class. No.: </label>001.433 WEL