**IMPORTANT MESSAGE: Due to new data release, the data-center will be down from 10 AM - 3 PM on May 28, 2015. **
 
 
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Questionnaire
Codebook    
QxQs        
Procedures,
Guides,
User manuals



























   
Cross wave family
documentation

     
   
Marriage history / codebook  /     
Childbirth & adoption
history / codebook
 /     
Parent identification / codebook  /     
Cross-year individual / codebook  /     
Sample weights