TY  - BOOK
AU  - Johnston,Carol A.
TI  - Geographic information systems in ecology
SN  - 0632038594
U1  - 577.0285 
PY  - 1998///
CY  - Oxford, Malden, MA
PB  - Blackwell Science
KW  - Ecology
KW  - Geographic information systems
KW  - ecologia
KW  - Sistema de informaciÃ³n geogrÃ¡fica
N1  - Includes bibliographical references (p. 209-232) and index
ER  -