TY  - BOOK
AU  - Fotheringham A S
AU  -  O'kelly M E
TI  - Spatial interaction models: Formulations and applications   
T2  - Studies in Operational Regional Science
U1  - X:89K:(B), M9 
PY  - 1989///
CY  - Dordrecht
PB  - Kluwer Academic         
KW  - Location Economics
ER  -