TY  - BOOK
AU  - Walker, Melissa
TI  - Principles of geographical information systems
U1  - Cir./910.285/W151 
PY  - 2022///
CY  - New York
PB  - Clanrye International
KW  - Geographic information systems
KW  - Information storage and retrieval systems
KW  - Geography
N1  - Includes index
ER  -