Haaga, John,d1953- <br/><br/>
Mechanisms for the association of maternal age, parity, and birth       spacing with infant health / 
John G. Haaga ; supported by the Rockefeller Foundation. 
 - California :  Rand Corporation,  1991 
 - v, 44 p. ;c28 cm 
 - A Rand note ;vN-2991-RF .
 - Rand note ;vN-2991-RF .
<br/><br/><label>ISBN: </label> Hadiah