TY  - BOOK
AU  - Wall W D
AU  -  Williams H L
TI  - Longitudinal studies and the social sciences
T2  - Social science research council reviews ,8
SN  - 0 435 82847 9
U1  - U182, L0 
PY  - 1970///
CY  - London
PB  - Heinemann UK         
KW  - Geography
ER  -