TY  - BOOK
AU  - Unwin,David J.
AU  - Dawson,John A.
TI  - Computer programming for geographers / 
SN  - 0-582-30095-9
PY  - 1985///
CY  - London [etc.] : 
PB  - Longman, 
N1  - Biliografía.- Indices
ER  -