Armstrong, Bruce K <br/><br/>
Principles of exposure measurement in epidemiology/ 
Armstrong, Bruce K; White, Emily, ; Saracci, Rodolfo 
 - New York:  Oxford University press,  1992. 
<br/><br/><label>ISBN: </label>9780192620200 
<br/><br/><label>Dewey Class. No.: </label>614.42  / ARM