TY  - BOOK
AU  - BUTTENFIELD Barbara P
AU  -  McMASTER Robert B Ed.
TI  - Map generalization:  Making rules for knowledge representation   
SN  - 0582080622
U1  - U11, N1 
PY  - 1991///
CY  - Essex
PB  - Longman Scientific & Technical       
KW  - Geography
N1  - Bibliography P 227-239
ER  -