TY  - RPRT
A1  - Plewis, I.
A1  - Calderwood, L.
A1  - Hawkes, D.
A1  - Nathan, G.
T1  - National Child Development Study and 1970 British Cohort Study technical report: Changes in the NCDS and BCS70 populations and samples over time
Y1  - 2004
PB  - University of London, Institute of Education, Centre for Longitudinal Studies
CY  - London
IS  - 39 pp.

ER  -