TY  - BOOK
AU  - Unwin,David J.
TI  - An introduction to trend surface analysis
T2  - Concepts and techniques in modern geography
SN  - 0902246518
PY  - 1975///
CY  - Norwich
PB  - Geo Abstracts
KW  - Trend surface analysis
N1  - Bibliography : p.36-40
ER  -