Child mortality in developing countries  : socio-economic differentials, trends and implications 
/ United Nations 
. - New York  : United Nations, 1991
. - IX-123 p.  ; 28 cm. 
<br/><br/><label>ISBN: </label>9211512336 
<br/><br/><label>Source: </label> Dons divers 
<br/><br/><label>Universal Decimal Class. No.: </label>312.2