TY  - BOOK
AU  - Tidswell W V
AU  -  Barker S M
TI  - Quantitive methods :  An approach to socio-economic   
SN  - 0 7231 0518 9
U1  - U:(B), L1 
PY  - 1971///
CY  - London
PB  - University Totorial Press U K      
KW  - Modern Geography
ER  -