TY  - BOOK
AU  - Gilbertson D D and others
TI  - Practical ecology for geography and biology :  Survey , mapping and data analysis   
SN  - 0 09 162651 X
U1  - U:(G:5), M5 
PY  - 1985///
CY  - London
PB  - Hutchinson          
KW  - GEOGRAPHY
N1  - Bibliography P 302-311; Appendix P 312-314
ER  -