TY  - BOOK
AU  - Clifford, Nicholas J.
AU  - Valentine, Gill
TI  - Key methods in geography
SN  - 0-7619-7492-X
U1  - 911 
PY  - 2003///
CY  - London
PB  - Sage Publications
KW  - Human geography
KW  - Geographical data collection
KW  - Geographical research
ER  -