Harder, Theodor <br/><br/>
Introduction to mathematical models in market and opinion research :  with practical applications, computing procedures, and estimates of computing requirements / 
Theodor Harder 
 - Dordrecht :  Reidel ,  1969 
 - ix, 194p. ;  23 cm. 
<br/><br/>Bibliography: p. 193-194. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marketing--Mathematical models<br/>Public opinion polls
<br/><br/><label>Dewey Class. No.: </label>330.18  / HAR