TY  - BOOK
AU  - Walford,Nigel
TI  - Geographical data: characteristics and sources 
SN  - 0471970859 (alk. paper)
U1  - 910.28557 22
PY  - 2002///
CY  - West Sussex, England, New York
PB  - Wiley
KW  - Geographic information systems
N1  - Includes bibliographical references (p. [245]-258) and index
UR  - http://www.loc.gov/catdir/description/wiley036/2001046626.html
UR  - http://www.loc.gov/catdir/toc/wiley021/2001046626.html
ER  -