TY  - BOOK
AU  - Bird,J.H.
TI  - The changing worlds of geography: a practical guide to concepts and methods 
SN  - 0198741820
PY  - 1993///
CY  - Oxford
PB  - Clarendon Press
KW  - Geography
KW  - Methodology
N1  - References : p. 257-286
ER  -