Sowell,Thomas <br/><br/>
Preferential policies  : an international perspective 
/ Thomas Sowell 
. - New York  : William morrow and company, 1990
. - 221 p.  ; 22 cm. 
<br/><br/><label>Source: </label> Don du CCA 
<br/><br/><label>Universal Decimal Class. No.: </label>331.1