TY  - BOOK
AU  - Tomlinson,R.F.
AU  - Calkins,James A.
AU  - Marble,D.F.
ED  - United Nations Educational, Scientific and Cultural Organization,
TI  - Computer handling of geographical data: an examination of selected geographic information systems 
SN  - 9231013408 (pbk.)
U1  - 333.7072 
PY  - 1976///
CY  - Paris
PB  - U N E S C O
KW  - Geography
KW  - Data processing
ER  -