TY  - BOOK
AU  - Wall,William Douglas
AU  - Williams,H.L.
ED  - Social Science Research Council (Great Britain)
TI  - Longitudinal studies [and] the social sciences
SN  - 0435828479 :
U1  - 300.18 
PY  - 1970///
CY  - London
PB  - Heinemann
KW  - Social sciences
KW  - Research
KW  - Longitudinal method
ER  -