TY  - RPRT
A1  - Bethel, J.
A1  - Green, J.L.
A1  - Nord, C.
A1  - Kalton, G.
A1  - West, J.
T1  - Early Childhood Longitudinal Study, Birth Cohort (ECLS-B): Methodology report for the 9-month data collection (2001-02): Vol. 2. Sampling
Y1  - 2005
PB  - National Center for Education Statistics
CY  - Washington D.C.

ER  -